Calcium carbonate is a main contributor to the "hardness" of water. The amount of CaCO3 in a water sample can be determined by titrating the sample with an acid, such as HCL, which produces water and CO2. State a balanced chemical equation for this reaction. Generate a plot of solution pH versus volume of 0.100 M HCL added for the titration of a solution of 250 mg of CaCO3 in 200.0mL of water with 0.100 M HCL; suppose that the HCL solution is added in 5.00mL increments. Explain what volume of HCL corresponds to the equivalence point?