You perform an alkalinity test on a water sample with an initial pH of 7.2. It requires 6.8 meq of acid per L of sample to complete the test (i.e. to reduce the pH to 4.5).

A) What was the alkalinity in mg/L as CaCO3?

B) How many liters of 1 M sulfuric acid (H2SO4, strong) would you have to mix into 1L of the water sample to lower the pH 4.5?

C) Identify the dominant carbonate-containing compound in the original water sample and after the titration.

D) Calculate CT in mole/L and the bicarbonate concentration in the original sample in mg/L.