Water Hardness Titration
Q: 0.4985 g CaCO3 is dissolved in HCl and diluted to 500.0 mL. A 25.00 mL aliquot of this standard requires 23.62 mL EDTA solution for titration. A 100.0 mL water sample requires 30.13 mL EDTA for titration. What is the total hardness of the water expressed in ppm CaCO3?
Step 1: Calculate ppm CaCO3 in standard solution.
Step 2: Calculate concentration of EDTA in mg CaCO3 per mL EDTA.