The chemical formula for KHP is C 8 H 5 KO 4. the following data, calculate the molarity of. 9666 g/mol. (NOTE: The chemical formula of KHP is HKC 8 H 4 O 4. During his titration, which required 18. Our calculator can also find the mass of substance you need to add to your solution to obtain a desired molar concentration,. Volume NaOH used = 43. Aqueous solution is acidic. To get molar mass 204. Calculate the mass of H 2 C 2 O 4. Titrations are usually carried out on acid-alkali reactions, to determine what volumes of the acid and alkali are required to create a neutral solution. This online unit converter will help you to convert the grams of a molecule to the number of moles based on the weight of given chemical equation / formula. You know the mass in grams of the KHP used in the titration: # mol KHP = Mass in grams of KHP Molar mass of the KHP (204. Calculate the mass of KHP needed to react completely with 25 mL of a 0. From the following data, calculate the molarity of the NaOH solution: mass of KHP 2. Fill the buret and adjust the volume between 0 and 1 mL. 9 g of KHP into a tared plastic weighing dish. For the sake of simplicity, we discussed situations in which the reactants and the products of a given reaction were the only chemical species. The techniques we have used with diprotic acids can be extended to diprotic bases. 001800 moles of KHP. 22g/mol) is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. Equivalent Weight of Unknown Acid, based on Sample #1. A gram is a metric unit of mass (weight) which is abbreviated as g. A student weighs out 9. 4 g of KHP crystals (note the formula on the label) and dissolve them in about 150 mL of deionized water in a 400 mL beaker. Calculate the mass of Cu 2 SO 4. Titration reactions are just neutralization reactions. Begin by preparing a 0. Fill the buret and adjust the volume between 0 and 1 mL. BBririan an AAndersnderson on What What We We LeLernd rnd iin n SSkokool ol LaLast st Week Week Naming Ionic Compounds Molecular Equations Simple Solubility Rules. KHP (Molar Mass = 204. 0 g of acetic acid in one mole of acetic acid. mass in grams of fatty acid formula weight (4) When the formula weight is known, the "n" in CH 3 (CH 2) n CO 2 H can be calculated using equation 5. For a monoprotic acid, which only transfers one hydrogen ion, its equivalent mass equals its molar mass. For instance, you can find the molar mass of an acid by titrating the acid with a solution of base of known concentration. 13 matches found for KHP Advanced Search | Structure Search Sort By Relevance Name ↑ Name ↓ Base Name ↑ Base Name ↓ Formula Weight ↑ Formula Weight ↓. ) The concentration of a standard solution is known very precisely. asked by melbell on October 7, 2014; AP chemistry. A student weighs a sample of potassium hydrogen phthalate (KHP) to prepare a primary standard for a titration. Since it has only one ionizable hydrogen ion the equivalent weight is the same as the formula weight. To calculate the molecular weight one needs to add the atomic weights of all the atoms in the molecular formula unit. 5H2O may cause burns to eye and skin. Grams of NaOH needed = (1N)(40 eq. (Required reagents: KHP, ACS grade) Standardization of Titrant – recommended for. The molecular weight of KHP is 204. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100. Add eight drops of. How to Calculate Molarity of Standard Solution if Its Volume and the Weight of Primary Standard are Kown Problem: A student is preparing for the acid base titration , he was standardized a hydrochloric acid solution by titrating it with 0. The formula of KHP is: It contains one ionizable H+. Mass in grams of KHP Molar mass of the KHP (204. KHP is a weak acid. Acid-base titrations are also called neutralization titrations because the acid reacts with the base to produce salt and water. EXPERIMENT 8: ACID-BASE TITRATION: EQUIVALENT WEIGHT OF ACID 101 1. This is an open book exam, but you may only use materials that you have authored, such as your lab notebook, lab reports (including grading comments by your TA), and personal handwritten or typed notes. The mass need not be exactly 0. The "P" in "KHP" is an abbreviation for the phthalate ion (C 8 H 4 O - ) not a phosphorus atom: the molar mass of KHP is 204. Moles of unknown acid equal moles of NaOH at the first equivalence point (see Equation 3). Your KHP is potassium hydrogen phthalate, so I suppose you are trying to standardize sodium hydroxide against a primary standard acid. Answer and. 300M solution. A student weighs a sample of potassium hydrogen phthalate (KHP) to prepare a primary standard for a titration. Acid value (or neutralization number or acid number or acidity) is the mass of potassium hydroxide (KOH) in milligrams that is required to neutralize one gram of chemical substance. React in a known manner with the reagent to be standardized. KHP is an acidic substance, with the ionizing hydrogen being set forward in the formula for emphasis. It will calculate the total mass along with the elemental composition and mass of each element in the compound. Loading Unsubscribe from mrsjulianchem?. 4 g of KHP crystals (note the formula on the label) and dissolve them in about 150 mL of deionized water in a 400 mL beaker. Add AMP Ultra to batch. potassium hydrogen phthalate (KHP), KHC 8 H 4 O 4, is used to standardize solutions of bases. 00 g/mol) required for standardization of the NaOH solution. Inorganic chemistry. 08g for one mole. The word caustic means 'burns' Sodium hydroxide is a white solid and is available in pellet of powder forms. The molar mass and molecular weight of GaClO3 is 153,174. Perform at least three standardization titrations where the results agree to ±1%. Pre-mix Butylene Glycol, Natrosol and Xanthan Gum. When we are done I'll round off to two digits, the same as in the 2. CONCENTRATION UNITS A solution is a homogeneous mixture of two or more chemical substances. Data Table-. We calculated that was the same as 0. The Common Ion Effect and Solubility Introduction: Potassium hydrogen tartrate (cream of tartar), KHC 4 H 4 O 6, is a weak acid, that is not very soluble in water. 07 M solution of potassium hydrogen phthalate (KHP, formula mass = 204. You can also calculate the mass of a substance needed to achieve a desired molarity. The calculator can be used to calculate the chemical formula of a range of. Since the molar mass of KHP is 204. Calculation of titration result is always based on the stoichiometry of the titration reaction. (NOTE: The chemical formula of KHP is HKC 8 H 4 O 4. What is the normality of an acid if 21. Are you sure that you want to delete this answer?. For the sake of simplicity, we discussed situations in which the reactants and the products of a given reaction were the only chemical species. Have a high gram formula weight to minimize weighing errors. 4 g of KHP crystals (note the formula on the label) and dissolve them in about 150 mL of deionized water in a 400 mL beaker. Second, the equivalent mass of the unknown acid is determined by titrating a known amount of the acid with the standardized NaOH. Dissolve EACH OF THE FOUR KHP samples in 25 ml of distilled water. This program determines the molecular mass of a substance. An aqueous solution of sodium hydroxide (NaOH) was standardized by titrating it against a 0. The molar mass of KC 8 H 5 O 4 is 204. The titration of 0. The mass fraction of potassium hydrogen phthalate (KHP) from a specific batch was certified as an acidimetric standard. To do this the student weighs out a 1. We will do this by pulling together everybody’s data, then calculating the average, standard deviation, and relative standard deviation. KHP is a weak acid. asked by melbell on October 7, 2014; AP chemistry. ) If this concentration unit is used, the measurment of the mass of the NaOH solution allows a direct conversion to the moles of NaOH added. Weigh enough solid KHP into a 250 mL Erlenmeyer flask to require ~35 mL of 0. Then phosphorus. 9 grams of dry KHP (potassium hydrogen phthalate) into a tared, clean 200- or 250- mL Erlenmeyer flask. In order to determine this we need to know the number of moles of NaOH that reacted with the KHP and the volume in liters of the NaOH solution that contained that said number of moles of NaOH. To determine the concentration of a sodium hydroxide solution through a titration, the primary standard must be an acid. In order to determine the exact concentration of a sodium hydroxide solution you must standardize it by titrating with a solid acid that is not hygroscopic. An unknown KHP sample weighing 0. 00180 moles of Aspirin. 500 g is titrated to the phenolphthalein equivalence point with 12. Some primary standard acids are potassium hydrogen phthalate (KHP), oxalic acid dihydrate, sulfamic acid, and benzoic acid. Standardization of a NaOH Solution with Potassium Hydrogen Phthalate (KHP) and Titration of Vinegar with Standardized NaOH Objective You will determine the concentration (standardize) of an unknown solution of NaOH using the primary standard, potassium hydrogen phthalate. Sample Calculations. Given that the formula mass of acetic acid is 60. phthalate (KC8H5O4, often abbreviated KHP). vinegar by weight, you need to convert the moles of acetic acid to a mass of acetic acid. Computing molecular weight (molecular mass) To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets. Volume (V) of water = 100 cm3 = 0. 33 mL of NaOH solution. 9 g, the titration may require more than 50 mL of titrant, making it necessary to refill the buret and thereby introducing two more buret reading errors. During an acid-base titration, there is a point when the number of moles of acid (H+ ions). Equivalent weight depends on type of the substance. It is the intermediate species of the phthalic acid system Ka 2 = 3. A known mass of KHP was titrated with the NaOH solution until a light pink color appeared using phenolpthalein indicator. 200 M NaOH is used to neutralize 10. Then sprinkle in MSS-500W and Kaolin. Here are examples of how to calculate the normality of a solution. relative atomic masses are H=1 and O=16 relative molecular mass or M r = (1x2) + 16 = 18 (molecular mass of water) Relative molecular mass/ relative formula mass calculation Example 2. Weight of weighing boat before adding KHP = 2. Using an analytical balance, weigh out close to 0. 484 g; buret reading before titration 0. 0 mL of H 2 SO 4. Add water to the main beaker. During an acid-base titration, there is a point when the number of moles of acid (H+ ions). 00mL HKC8H4O4 (or KHP) Can you tell me in a few words what exactly is happening in this reaction? After an indicator is added and mixing the 2 solutions we get NaKC8H4O4 + H2O What is NaKC8H4O4?. Consider the reaction equation to be as shown below. 99 Grams Of KHP. The atomic weight of sodium is 22. Multiply the mass by the amount of the element in the compound. , in standardization of Perchloric Acid in Glacial Acetic Acid), Methyl Violet or Crystal Violet indicator is commonly used. 57 D3 Table 3. Make sure your buret is clean and the stopcock is tightened. relative atomic masses are H=1 and O=16 relative molecular mass or M r = (1x2) + 16 = 18 (molecular mass of water) Relative molecular mass/ relative formula mass calculation Example 2. 1421 g sample of potassium hydrogen phthalate (KHP). unii-v561v90bg2,perchloric acid,perchloric acid acid by mass forbidden,perchloric acid, acs reagent,perchlorsaeure,perchioric acid,ueberchlorsaeure,hyperchloric acid,hclo4 PubChem CID 24247. 408 KHP titration C 8 H 5 O 4-+ OH- H 2 O + C 8 H 4 O 4 2-Prelab Assignment A 0. Acids and bases react with each other by transferring hydrogen ions. The reaction of KHP with NaOH is similar to that of HCl. 2131 g required 36. ALL RIGHT RESERVED. The titration of the KHP with NaOH can be express by the chemical reaction: OH(aq) + KHP(aq) H2O + KP(aq). 46 mL of the sodium hydroxide solution was required to react with 0. Use the Virtual Laboratory to standardize an unknown NaOH solution (approximately 0. 99 Grams Of KHP. 0874g initial buret volume: 0. Density Converter / Metric System / Gram Per Litre [g/L] Online converter page for a specific unit. In a titration 0. The molar mass of KC 8 H 5 O 4 is 204. This is done by taking a known standard, such as KHP, taking the mass, finding the moles, converting that via the stoichiometical ratio to the moles of the titrant all divided by the amount need to titrate the grams of KHP. the formula for KHP is C8H5O4K therefore, (12. Part a) Preparation of a standard acid (KHP) solution. 0427 mole of NaCl. Definitions of molecular mass, molecular weight, molar mass and molar weight. In the titration, 24. Then using the molecular weight 204. Use uppercase for the first character in the element and lowercase for the second character. The techniques we have used with diprotic acids can be extended to diprotic bases. The mass need not be exactly 0. They neutralize the solid acid with 15. 5H2O is a blue crystal at room temperature. 0874g initial buret volume: 0. Potassium hydrogen phthalate(877-24-7) Raman Potassium hydrogen phthalate(877-24-7) 1 H NMR Potassium hydrogen phthalate(877-24-7) IR1 Potassium hydrogen phthalate(877-24-7) IR2 Potassium hydrogen phthalate(877-24-7) 13 C NMR. Purity of the Potassium KHP is 99. 10 M KHP solution. 10 M HCl (aq) and dilute with water until the total volume reaches 75 mL. Determine the concentration of acetic acid of vinegar, in terms of % (m/m). Calculating concentration of acetic acid in diluted vinegar titration? So I took 50mL of commercial vinegar and added 200mL of distilled water to it in a 250mL volumetric flask. Knowing the mass of Magnesium used and the mass of magnesium oxide produced in this reaction can determine the mass of oxygen used (Corwin 53). 5 (its pka) when the [salt] = [acid] (use your calculator to prove that the log of "1" equals zero). The volume of. Heat to 85°C. Calculation of titration result is always based on the stoichiometry of the titration reaction. Example #7: When 2. Then dilute to the mark with more distilled water. 0 mmol or 40. 72g/mol What is the chemical formula and name of this acid? The formula is HBrO4, and the name is perbromic acid. When KHP and NaOH combine, a positive hydrogen ion leaves the KHC8H4O4 and a negative hydrogen atom leaves the NaOH. A sample of a liquid carboxylic (fatty) acid weighing 0. To find the mass of KHP we first weigh the container, obtaining a value of 60. It is available as a pure, stable, crystalline solid that can be accurately weighed. Enter the molecular formula of the substance. 693 Grams OfKHP. This online unit converter will help you to convert the grams of a molecule to the number of moles based on the weight of given chemical equation / formula. 75 mL of KOH solution for complete neutralization. React in a known manner with the reagent to be standardized. 6H 2 O required to prepare 200. The mass need not be exactly 0. BBririan an AAndersnderson on What What We We LeLernd rnd iin n SSkokool ol LaLast st Week Week Naming Ionic Compounds Molecular Equations Simple Solubility Rules. From the following data, calculate the molarity of the NaOH solution: mass of KHP 2. Using the burette, tittrate sodium hydroxide solution into. Have a high gram formula weight to minimize weighing errors. Volume (V) of water = 100 cm3 = 0. The reaction of KHP with. What is the %KHP in the sample? (Formula weight of NaOH = 40. • A compound with a reasonably high formula weight Few substances meet these criteria, so the number of useful primary standards is quite limited. The sum of the atomic weights of all atoms making up a molecule. (KHP), and transfer into a 50-mL volumetric flask. So Im doing a titration with NaOH and oxalic acid, prepared by adding 14g of the NaOH to 5dm^3 of H2O, the acid is (COOH)2. with KHP Measure ca. The titration of 0. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100. What is the concentration of the stock Ba(OH)2 solution? KHP is an acid with one acidic proton. There is one proton, or equivalent, per mole of KHP. 354 g; buret reading before titration 0. The equivalent value is determined using the molecular weight and valence of the chemical species. Potassium Biphthalate, BiotechGrade P1192 | 877-24-7 Potassium Biphthalate, BiotechGrade, also known as potassium hydrogen phthalate or KHP, is an acidic salt compound used as a primary standard for acid-base titrations and as a buffering agent. KHP is a monoprotic weak acid with Calculate the pH of the solution that results when 0. 75 mL of a sodium hydroxide solution. Burettes are used by taking the difference in your initial and final readings. Since it has only one ionizable hydrogen ion the equivalent weight is the same as the formula weight. Then 35 of distilled water was added and swirl the flask to make sure them dissolve in the solution. However, since these are relative masses of the atoms any mass unit can be used, as shown by the two columns to the right of the arrows, above. % Element = (number of atoms)(atomic weight)/(formula weight of the compound) x 100. This is the procedure of titration and these procedures were repeated three times. Show the calculation for determining the mass of NaOH pellets required to prepare 250 mL of 0. Substance name : Potassium Hydrogen Phthalate CAS-No. To calculate the molecular weight one needs to add the atomic weights of all the atoms in the molecular formula unit. We calculated that was the same as 0. What is the normality of an acid if 21. Potassium hydrogen phthalate, KHP, (molar mass = 204. PHYSICAL DESCRIPTION: White or yellowish-white to pale orange fine crystalline powder. Perform at least three standardization titrations where the results agree to ±1%. Add 50 ml of DI water and 2 drop of phenolphthalein indicator. The standard formula is C = m/V, where C is the concentration, m is the mass of the solute dissolved, and V is the total volume of the solution. 408 KHP titration C 8 H 5 O 4-+ OH- H 2 O + C 8 H 4 O 4 2-Prelab Assignment A 0. Examples: Fe, Au, Co, Br, C, O, N, F. Citric acid is a weak, polyprotic acid that undergoes the following reaction with sodium hydroxide. Hazardous Combustion Sodium oxides, hydrogen. Knowing the mass of Magnesium used and the mass of magnesium oxide produced in this reaction can determine the mass of oxygen used (Corwin 53). You can also calculate the mass of a substance needed to achieve a desired molarity. It is water soluble and available in high purity. 17 g The most commonly used burets in the lab have a 50-mL capacity. 0042 moles NaOH (1 mole KHP/1 mole NaOH)(205. Dissolve each sample in about 30-50 mL of deionized water. ) • Gross weight is defined as the total weight of the vehicle or vehicles and the load thereon. What is the normality of an acid if 21. 18 mL were needed to titrate 0. Eye Contact Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Saturday 9am - 5pm. Weigh the evaporating dish with the remaining solid. WEIGH out 4 samples of reagent-grade KHP, potassium acid phthalate, each having a weight of about 0. Composition of KHP. Have a high gram formula weight to minimize weighing errors. 200 M NaOH is used to neutralize 10. 74 mL of NaOH solution were necessary to neutralia acid, what is the concentration of the NaOH solution?. Weight of weighing boat after transfer = 2. For very dilute solutions in water, since the mass of 1. 00 g/mole; formula weight Na2CO3 = 105. Mole is a standard measurement of amount which is used to measure the number atoms (or) molecules. 13 matches found for KHP Advanced Search | Structure Search Sort By Relevance Name ↑ Name ↓ Base Name ↑ Base Name ↓ Formula Weight ↑ Formula Weight ↓. 0, and that the density of the vinegar solution is 1. The formula weight of KHP is 204. Chapter 4 Reactions in Aqueous Solution. Swirl to dissolve the solid. 3 * Solutions*needed*for*this*experiment:* * Solutionspreparedbythestudent* * Solutionsprovidedbytheinstructor* 0. Finally, the pK. 3 g Mg(OH)2. Fill the buret and adjust the volume between 0 and 1 mL. Calculate the mass of H 2 C 2 O 4. One mole of H+ ion in KHP reacts with one mole of OH- ion in NaOH. 22 g/mol CAS number 877-24-7. 2 would mean that there would need to be 2. The titration of the KHP with NaOH can be express by the chemical reaction: OH(aq) + KHP(aq) H2O + KP(aq). 0, and that the density of the vinegar solution is 1. 006219mol) m. So when you dissolve the salt in water, you get potassium cations and hydrogen phthalate anions in 1:1 mole ratios. Calculate how many mL of 0. In 3 separate 250 mL Erlenmeyer flasks, pipet 25 mL of 0. Gallon (gal) is a unit of Volume used in Standard system. Component Common Name / Synonyms CAS# Chemical Formula % by Weight Sodium Hydroxide Caustic Soda; Soda Lye 1310-73-2 NaOH ≥ 96. 03187 L = 0. Preparation of solutions calculator is a useful tool which allows you to calculate how many solid chemicals or stock solutions you will need to prepare the desired solution. 484 g; buret reading before titration 0. 92 EXPERIMENT 7: ACID-BASE TITRATION: STANDARDIZATION 13. Moles of unknown acid equal moles of NaOH at the first equivalence point (see Equation 3). (NOTE: The chemical formula of KHP is HKC 8 H 4 O 4. Instead, scientists use the NaOH solution to titrate a solution of potassium hydrogen phthalate (KHP) to use as a primary standard since KHP does not absorb moisture or carbon dioxide. Two common primary standard bases are pure sodium carbonate and borax. 65*1000 = 0. So, the amount of KHP needed is also 40. Remove cont act lenses if present and easy to do so. Make sure your buret is clean and the stopcock is tightened. Calculate the formula weight of potassium hydrogen phthalate (KHP) and the associated uncertain? Potassium hydrogen phthalate (abbreviated as KHP) has the molecular formula KHC8H4O4 and a molar mass of?. 349523125 g. NOTE: The “P” in KHP ( 204 g/ mol ) is an abbreviation for “ phthalate ”. KHC8H4O4 can be used for pH meter calibration or as a buffer agent. KHP is an acid with one acidic hydrogen and a molar mass of. Data Table-. 22[C6H4(COO)2]·H2O) single crystals have been grown from an aqueous solution of potassium hydrogen phthalate enriched with equimolar concentration sodium hydroxide at room temperature. 0 g of acetic acid = 1. 227 1 Table 2. List all other reagents (formulas and names) in your notebook. Weights of atoms and. What is the molarity of the final solution? How many grams of KHP are in the 10. $\begingroup$ If the acid is solid, then the final solution has the same density as pure water due to neutralization, so you basically know the volume and the total mass contained, and you know the mass of $\ce{NaOH}$ added; I think the book may be right $\endgroup$ – alandella Jan 20 '14 at 11:47. To calculate the molecular weight one needs to add the atomic weights of all the atoms in the molecular formula unit. 99 g/mol and chlorine is 35. As a weak acid hydrogen phthalate reacts reversibly with water to give hydronium (H 3 O +) and phthalate ions. Standardization of a base titrant solution, used to determine an amount of acid in a sample, is often performed using a known, dry weight of potassium hydrogen phthalate (KHP) as the standard. Stable in Air A primary standard cannot decompose in, absorb or otherwise react with any components of air. A gram is a metric unit of mass (weight) which is abbreviated as g. “KHP” and “KHPH” are abbreviations/acronyms for potassium hydrogen phthalate, they are not the chemical formula of potassium hydrogen phthalate. 627Final burette reading (mL. Consider the reaction equation to be as shown below. Weight of tablet(s) before grinding g g 5. Calculate the molarity of the sodium hydroxide. Inorganic chemistry. Best Answer: KHP reacts with NaOH in 1:1 molar ratio. 33 mL; buret. Knowing the weight and molecular weight of the acid and the volume of NaOH solution used to neutralize the acid, you can calculate the exact Molarity of the NaOH solution. One mole of H+ ion in KHP reacts with one mole of OH- ion in NaOH. • The Federal Bridge Formula Chart is. 0 g of acetic acid = 1. The Common Ion Effect and Solubility Introduction: Potassium hydrogen tartrate (cream of tartar), KHC 4 H 4 O 6, is a weak acid, that is not very soluble in water. Then the equivalent mass is calculated from the data. The titration of the KHP with NaOH can be express by the chemical reaction: OH(aq) + KHP(aq) H2O + KP(aq). From the balanced equation the NaOH:"KHP" mole-to-mole ratio is 1:1. It covers an explanation of the terms mole fraction and partial pressure, and looks at K p for both homogeneous and heterogeneous reactions involving gases. 233 g/mol for potassium hydrogen phthalate, the mols were converted to grams which would then be a proportion of the mass of its sample, yielding a potassium hydrogen phthalate percentage or concentration in the unknown sample. LabChem Inc. Some primary standard acids are potassium hydrogen phthalate (KHP), oxalic acid dihydrate, sulfamic acid, and benzoic acid. Here are examples of how to calculate the normality of a solution. The reaction between KHP and NaOH is shown by the balanced equation KHC8H4O4 + NaOH = NaKC8H4O4 + H2O. PRE-LAB: LABORATORY 1. 2 amu grams of KHP molecular mass of KHP grams of KHP. Fill the flask to the mark with DI and mix well to dissolve the solid. Sample Calculations. Given that the formula weight of acetic acid is 60. Show the calculation for determining the mass of NaOH pellets required to prepare 250 mL of 0. 408 KHP titration C 8 H 5 O 4-+ OH- H 2 O + C 8 H 4 O 4 2-Prelab Assignment A 0. An unknown KHP sample weighing 0. Calculate how many mL of 0. org Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). 22 g/mol CAS number 877-24-7. 23 mL; buret reading after titration 39. Zorrilla Michelle Cruz Abstract The experiment focused on the Standardization by titration of a weak acid, potassium acid phthalate (KHP), with a strong base, sodium hydroxide (NaOH) in order to determine the concentration of the NaOH solution and by quantitative analysis of potentiometric data. Your KHP is potassium hydrogen phthalate, so I suppose you are trying to standardize sodium hydroxide against a primary standard acid. (Required reagents: KHP, ACS grade) Standardization of Titrant – recommended for. Using an analytical balance, weigh out close to 0. Molecular weight. Knowing the mass of Magnesium used and the mass of magnesium oxide produced in this reaction can determine the mass of oxygen used (Corwin 53). Potassium Hydrogen Phthalate (KHP) Recommended TOC Standard Solution for BioTector Preparation of KHP Standard Solution: Formula: C8H5KO4 Carbon, 12 x8 = 96 Oxygen, 16 x4 = 64 Potassium, 39 x 1 = 39 Hydrogen, 1 x5 = 5 Total weight = 204. 0, and the density of the vinegar solution is 1. Recommended use and restrictions on use. 0042 moles NaOH (1 mole KHP/1 mole NaOH)(205. $\begingroup$ If the acid is solid, then the final solution has the same density as pure water due to neutralization, so you basically know the volume and the total mass contained, and you know the mass of $\ce{NaOH}$ added; I think the book may be right $\endgroup$ – alandella Jan 20 '14 at 11:47. If a weight and acceleration are given, then the formula to find mass is that the weight 'W' is equal to the mass 'm' multiplied by 'g' the acceleration of gravity. It is a constant property of each substance - for example, the molar mass of water is approximately equal to 18 g/mol. Knowing the weight and molecular weight of the acid and the volume of NaOH solution used to neutralize the acid, you can calculate the exact Molarity of the NaOH solution.