Solution of KIO3 / KI provided Mass of KIO3 = 110.79 g L Volume of solution Approximate Concentration of [KIO3] (based on mass - do not use this in subsequent calculations but make sure standardized KIO3 calculated below is close to this value). = 20.0 Standardization of KIO3 = 0.02589 mol L-1 Purity of ascorbic acid = 99.49% Sample # 1 2 3 Weighed mass of ascorbic acid (g) 0.2138g 0.2033g 0.2014g volume of KIO3 (mL) 16.74mL 14.82mL 14.70mL [KIO3] (mol L-1) %

Solution of KIO3 / KI provided Mass of KIO3 = 110.79 g L Volume of solution Approximate Concentration of [KIO3] (based on mass - do not use this in subsequent calculations but make sure standardized KIO3 calculated below is close to this value). = 20.0 Standardization of KIO3 = 0.02589 mol L-1 Purity of ascorbic acid = 99.49% Sample # 1 2 3 Weighed mass of ascorbic acid (g) 0.2138g 0.2033g 0.2014g volume of KIO3 (mL) 16.74mL 14.82mL 14.70mL [KIO3] (mol L-1) %

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter2: Crystallization

Section: Chapter Questions

Problem 3Q

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Question

colculate the concentration of KIO3 based on the titrations values

Solution of KIO3 / KI provided
Mass of KIO3
= 110.79
g
L
Volume of solution
Approximate Concentration of [KIO3]
(based on mass - do not use this in
subsequent calculations but make sure
standardized KIO3 calculated below is
close to this value).
= 20.0
Standardization of KIO3
= 0.02589
mol L-1
Purity of ascorbic acid
= 99.49%
Sample #
1
2
3
Weighed mass of ascorbic acid (g)
0.2138g
0.2033g
0.2014g
volume of KIO3 (mL)
16.74mL
14.82mL
14.70mL
[KIO3] (mol L-1)
%

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