6. (10) The total alkalinity of waters is measured by titration, by addition of a strong acid until a predefined endpoint is reached (approximately pH=4.5 Standard Units, S.U.). At this pH, species such as HCO3,CO3=, and OHwill have reacted essentially completely and been protonated by the added acid. If 3.6mL of 0.02NH2SO4 is required to titrate a 100mL water sample to pH4.5, what is its total alkalinity 144.5=9.5 i. As equivalents/liter, and (Note that a 1N solution has a concentration of 1 equivalent/L). ii. Asmg/L of CaCO3