The following experimental process steps have been made to determine the hardness of water. Accordingly, 100 mL sample was acidified with a few drops of 6 M HCl and boiled for a while to remove the CO2 in it. Then, a few drops of methyl red (pH: 4.2-6.3) were added to the cooled sample and the solution was neutralized with 0.1M NaOH, then 2 mL of 0.01M pH10 buffer and 4-5 drops of EBT indicator were added and the solution was 0.0086M. It was titrated with EDTA until the color turned blue. Since the consumption of titrant is 11.44mL, calculate the amount of Ca in the water in terms of mg CaCO3. (Ca: 40, C: 12, O: 16)
The following experimental process steps have been made to determine the hardness of water. Accordingly, 100 mL sample was acidified with a few drops of 6 M HCl and boiled for a while to remove the CO2 in it. Then, a few drops of methyl red (pH: 4.2-6.3) were added to the cooled sample and the solution was neutralized with 0.1M NaOH, then 2 mL of 0.01M pH10 buffer and 4-5 drops of EBT indicator were added and the solution was 0.0086M. It was titrated with EDTA until the color turned blue. Since the consumption of titrant is 11.44mL, calculate the amount of Ca in the water in terms of mg CaCO3. (Ca: 40, C: 12, O: 16)
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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The following experimental process steps have been made to determine the hardness of water. Accordingly, 100 mL sample was acidified with a few drops of 6 M HCl and boiled for a while to remove the CO2 in it. Then, a few drops of methyl red (pH: 4.2-6.3) were added to the cooled sample and the solution was neutralized with 0.1M NaOH, then 2 mL of 0.01M pH10 buffer and 4-5 drops of EBT indicator were added and the solution was 0.0086M. It was titrated with EDTA until the color turned blue. Since the consumption of titrant is 11.44mL, calculate the amount of Ca in the water in terms of mg CaCO3. (Ca: 40, C: 12, O: 16)
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