A city water supply often draws water from the hypolimnion (the deep part of the lake) region of a thermally stratified lake. Initially, the water has a pH of 7.4 and an alkalinity of 0.8 mM. Prior to drinking water treatment, it can be beneficial to equilibrate the water by spraying it into the air.
(a) Predict the pH of the lake water after it has been sprayed into the air.
(b) Estimate the amount of carbon dioxide that was gained by or lost from the water during this aeration process.