87. What is the use of barium hydroxide in the precipitation of standard NaOH solution? a. catalyst b. preservative C. precipitate any carbonate in present in solution d. prevent the reaction of NaOH with carbonate 88. The general inspection levels on the right-hand side of the master table are the ones to be used in most sampling cases. Unless otherwise specified, Inspection level should be used C. III a. I b. IV d. II 89.33.5ml of 0.9998N NaOH was used in the titration of 50ml HCI solution. Calculate the normality. a. 0.6969N C. 0.6779N b. 0.6689N d. 0.6699N

87. What is the use of barium hydroxide in the precipitation of standard NaOH solution? a. catalyst b. preservative C. precipitate any carbonate in present in solution d. prevent the reaction of NaOH with carbonate 88. The general inspection levels on the right-hand side of the master table are the ones to be used in most sampling cases. Unless otherwise specified, Inspection level should be used C. III a. I b. IV d. II 89.33.5ml of 0.9998N NaOH was used in the titration of 50ml HCI solution. Calculate the normality. a. 0.6969N C. 0.6779N b. 0.6689N d. 0.6699N

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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PRE-LAB QUESTIONS 1. A student dissolves 2.006 g of FeSO4-7 H₂O in 40 mL of sulfuric acid and then dilutes it to 100.00 mL in a volumetric flask as described is Procedure steps 3-7. He then uses a pipet to transfer 10.00 mL of this solution into a flask for titration as in Procedure step 11. What mass of FeSO4-7 H₂O was transferred into the titration flask? (Keep this question in mind as you do your calculations for Pre-Lab Question 2 and for your calculations with your own data.) 2. Your partner has completed three acceptable titrations for standardizing the dilute potassium permanganate solution and he gives you all of the data. The solid standard used was FeSO4-7 H₂O, and it was dissolved and diluted to 100.00 mL. a. Calculate the molarities for the trials (Hint: you are going to need the balanced ionic equation and the formula mass of ferrous sulfate heptahydrate.) Mass of Standard Volume of Blank Volume of Standard Initial Buret Reading Final Buret Reading Volume of Titrant…