Q2. What is the pH of a solution of a freshwater solution at 25 degC containing 2 mM DIC (= H2CO3 + HCO3- + CO32-)?

Consider a closed system (i.e. no exchange with a gas phase) with the following chemicals: H2O, H+, OH-, H2CO3, HCO3-, CO32- a. Write down the acid-base reactions and the relevant conservation/balance expressions b. Find (and/or calculate) the equilibrium constants. Cite the sources used for any constants you use. c. Calculate the resulting (approximate) pH of the solution.