A 300mL water sample has an initial pH of 10. 40mL of 0.02 N H2SO4 were required to titrate the water sample to pH 4.5
a) What is the total alkalinity of water in mg/L as CaCO3?
b) Determine the species and the quantity of each of the species if the pH 8.3 equivalent point is reached after adding 15mL of acid.