Sample 1 43.07 g 42.05 g 1.02 g 8.95 mL .98 mL Sample 2 42.77 g 41.09 g 1.68 g 22.66 mL 8.95 mL 13.71 mL Mass of flask and KHP Mass of empty flask Mass of KHP Final buret reading Initial buret reading Volume of base used 7.97 mL Calculations: In the spaces below, show calculation set-ups for Sample 1 only. Show the answers for both samples in the boxes. Remember to use the correct number of significant figures in all calculations. (Ex. The number 0.005 has only 1 significant figure.) Calculations Table Sample 1 = 0.00499 moles KHP 1.68 g x 1 mole = 0.00822 moles KHP Sample 2 1. Moles of acid (KHP, molar mass = 204.2 1.02 g x 1 mole 204.2 g/mole 204.2 g/mole g/mole). Show calculations for Sample 1 here. 2. Moles of base used to neutralize the acid above. Show calculations for Sample 1 here. 3. Molarity of base (N2OH). Show calculations for Sample 1 here.

Sample 1 43.07 g 42.05 g 1.02 g 8.95 mL .98 mL Sample 2 42.77 g 41.09 g 1.68 g 22.66 mL 8.95 mL 13.71 mL Mass of flask and KHP Mass of empty flask Mass of KHP Final buret reading Initial buret reading Volume of base used 7.97 mL Calculations: In the spaces below, show calculation set-ups for Sample 1 only. Show the answers for both samples in the boxes. Remember to use the correct number of significant figures in all calculations. (Ex. The number 0.005 has only 1 significant figure.) Calculations Table Sample 1 = 0.00499 moles KHP 1.68 g x 1 mole = 0.00822 moles KHP Sample 2 1. Moles of acid (KHP, molar mass = 204.2 1.02 g x 1 mole 204.2 g/mole 204.2 g/mole g/mole). Show calculations for Sample 1 here. 2. Moles of base used to neutralize the acid above. Show calculations for Sample 1 here. 3. Molarity of base (N2OH). Show calculations for Sample 1 here.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.12QAP

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What is the absolute uncertainty and relative uncertainty of the molarity of the solution? M = = 0.078376462 = 0.078 M Pb2+
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