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Why we have to use the KHP as a primary standard solution?
A. Pure crystals
B. Mono protic acid
C. High molar mass
D. All
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- Which is the correct order of steps in the preparation of a hydrochoric acid standard solution with sodium bicarbonate standard solution. I. Dissolved sodium carbonate (13.25 g) in about 150 mL of distilled water in a beaker II. Solution of sodium carbonate was transferred into a volumetric flask and diluted to mark before mixing. III. Weigh the appropriate amount of the primary standard. IV. Titrate with enough volume of the acid to completely neutralize the base. V. Transfer 10.00 ml primary standard into an erlenmeyer flask and add indicator III, I, II, V, IV III, II, I, V, IV V, III, I, II, IV V, IV, III, I, IIDetermine the required grams of a solid organic acid (KHP – 204.2 g/mol) that used as a primary standard to standardize and neutralize a base such as NaOH which is 1.005 mol/L. the volume you can assumeA student weighs a sample of potassium hydrogen phthalate (KHP) to prepare a primary standard for a titration. She later discovers that the KHP was contaminated with sugar. To determine the amount of KHP in the mixture, she takes 4.678 g4.678 g of the mixture and make a 100.0 mL100.0 mL solution. The student then titrates 10.00 mL10.00 mL of this solution with a 0.1030 M0.1030 M sodium hydroxide solution. She finds that 15.15 mL15.15 mL of the NaOHNaOH solution is needed to reach the end point.
- 0.5 M of stock solution is given to be used for Titrant 1. Titrant 2 is going to be created by diluting 0.5 M stock solution to 0.1 M. How much stock solution (volume) will be needed to create 25 mL of the 0.1 M Titrant solution.A 50-mL solution of 0.5005 N standard NaOH was added to a 0.9250-g sample of Aspirin and was boiled for 10 minutes. After cooling a full pipet of phenolphthalein was added to the solution before it was titrated with 24.7 mL of 0.5015 N standard HCl solution until the disappearance of the pink color. The same procedure was carried using a blank which consumed 4.6 mL of the same standard acid. Calculate for the %Aspirin in the sample. Atom weights: C =12, H =1, O =16.Back titration method is used when the reaction between standard reagent and analyte is : Select one: a. Slow and complete b. Fast and incomplete c. Slow and incomplete d. Fast and complete
- EDTA: 0.2 M solution KH2PO4: 0.4 solution Sodium Nitrate MW: 84.9947 g/mol A 150 mL buffer solution of 50 mM of sodium nitrate, 25 mM KH2PO4, 0.05 mM EDTA (acid) is needed. How much of each is needed, also include how much water?How many mL of 0.1200 M KSCN will be needed in the back titration after addition of 30 mL 0.110 M AgNO3 solution to 0.3655g KI dissolved in 100 mL water? a. 1.1951 mL b. 5.1919 mL c. 9.1519 mL d. 1.5911 mL8-What is the advantage of Fajans method over Volhard method for chloride ion titration,Please explain?
- A saturated AgCl solution was analyzed and found to contain 1.25 x 10-5 M Ag+ ions. Use this value to calculate the Ksp of AgClWhy do we use a solid acid as a primary standard? During the standardization of NaOH, Shane didn’t notice that there was an air bubble in the tip of the buret when they started their rough titration. The bubble went away during the rough titration and Shane continued with two fine titrations. Does this affect the calculated concentrations of NaOH? Why or why not?A 250.0-mg sample of an organic weak acid was dissolved in an appropriate solvent and titrated with 0.0556 M NaOH, requiring 32.58 mL to reach the end point. Determine the compound’s equivalent weight.