1. If the bicarbonate concentration of a leachate is 1000 mg/L, and the pH measured in the field is found to be 5.8, estimate the partial pressure of the carbon dioxide within the landfill.

2. If the partial pressure of the carbon dioxide in the gas in contact with leachate within a landfill is one atmosphere, estimate the pH of the leachate. Assume the carbon dioxide in the landfill gas is the only factor affecting the pH of the leachate.