After removing the membranes from an eggshell, the shell is dried and its mass recorded as 5.613 g. The eggshell is transferred to a 250–mL beaker and dissolved in 25 mL of 6 N hydrochloric acid solution. After filtering, the solution containing the dissolved eggshell is diluted to 250 mL in a volumetric flask. A 10.00–mL aliquot is placed in a 125–mL Erlenmeyer flask and buffered to a pH of 10. Titrating with 0.04988 M EDTA requires 44.11 mL to reach the end point. Determine the amount of calcium in the eggshell as % w/w calcium carbonate.
After removing the membranes from an eggshell, the shell is dried and its mass recorded as 5.613 g. The eggshell is transferred to a 250–mL beaker and dissolved in 25 mL of 6 N hydrochloric acid solution. After filtering, the solution containing the dissolved eggshell is diluted to 250 mL in a volumetric flask. A 10.00–mL aliquot is placed in a 125–mL Erlenmeyer flask and buffered to a pH of 10. Titrating with 0.04988 M EDTA requires 44.11 mL to reach the end point. Determine the amount of calcium in the eggshell as % w/w calcium carbonate.
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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After removing the membranes from an eggshell, the shell is dried and its mass recorded as 5.613 g. The eggshell is transferred to a 250–mL beaker and dissolved in 25 mL of 6 N hydrochloric acid solution. After filtering, the solution containing the dissolved eggshell is diluted to 250 mL in a volumetric flask. A 10.00–mL aliquot is placed in a 125–mL Erlenmeyer flask and buffered to a pH of 10. Titrating with 0.04988 M EDTA requires 44.11 mL to reach the end point. Determine the amount of calcium in the eggshell as % w/w calcium carbonate.
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