Titration
- Problem Set In Precipitation Acid Base And Complexometric Titration 1 (136.44 KiB) Viewed 126 times
Problem Set in Precipitation, Acid-Base and Complexometric Titration
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Problem Set in Precipitation, Acid-Base and Complexometric Titration
Problem Set in Precipitation, Acid-Base and Complexometric
Titration
7. After removing the membranes from an eggshell, the shell is dried and its mass recorded as 5.613g. The eggshell is transferred to a 250-ml beaker and dissolved in 25 mL of 6M HCI. 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 endpoint. Determine the amount of calcium in the eggshell as % CaCO3. 8. The alkalinity of natural waters is usually controlled by OH-,C03, and HCO3, which maybe present singularly or in combination. Titrating a 100.0-ml samle to a pH of 8.3 requires 18.67 mL of 0.2812 M solution of HCl. A second 100.0-ml aliquot requires 48.12 mL of the same titrant to reach a pH of 4.5. Identify the sources of alkalinity and their concentrations in parts per million.
Titration
7. After removing the membranes from an eggshell, the shell is dried and its mass recorded as 5.613g. The eggshell is transferred to a 250-ml beaker and dissolved in 25 mL of 6M HCI. 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 endpoint. Determine the amount of calcium in the eggshell as % CaCO3. 8. The alkalinity of natural waters is usually controlled by OH-,C03, and HCO3, which maybe present singularly or in combination. Titrating a 100.0-ml samle to a pH of 8.3 requires 18.67 mL of 0.2812 M solution of HCl. A second 100.0-ml aliquot requires 48.12 mL of the same titrant to reach a pH of 4.5. Identify the sources of alkalinity and their concentrations in parts per million.