A solution of Ca(OH)2 (FM = 74.09) was used in determining the equivalent weight of an unknown acid. To do so, the said solution was standardized against 0.1235 g KHP (FM = 204.22), requiring 7.45 mL to reach the phenolphthalein endpoint. On the other hand, a 0.0543 g unknown acid requires 12.85 ml standard Ca(OH)2 to reach the desired endpoint. a. Calculate the standard normality of Ca(OH)2. b. Calculate the equivalent weight of the unknown acid. c. From the table below, what is the most probable identity of the unknown acid. Probable identity Ascorbic Acid, C6H§O6 Malonic Acid, C3H4O4 Succinic Acid, CH,O4 Citric Acid, CsH3O7 Formula weight Proticity 176.124 104.062 2 118.088 192.124 3

A solution of Ca(OH)2 (FM = 74.09) was used in determining the equivalent weight of an unknown acid. To do so, the said solution was standardized against 0.1235 g KHP (FM = 204.22), requiring 7.45 mL to reach the phenolphthalein endpoint. On the other hand, a 0.0543 g unknown acid requires 12.85 ml standard Ca(OH)2 to reach the desired endpoint. a. Calculate the standard normality of Ca(OH)2. b. Calculate the equivalent weight of the unknown acid. c. From the table below, what is the most probable identity of the unknown acid. Probable identity Ascorbic Acid, C6H§O6 Malonic Acid, C3H4O4 Succinic Acid, CH,O4 Citric Acid, CsH3O7 Formula weight Proticity 176.124 104.062 2 118.088 192.124 3

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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