Determine the pH?

Question

Carbonated beverages get their effervescence from dissolved CO2 gas. The bite comes from the acidic nature of the beverage resulting from the following reaction.

H2CO3(aq) + H2O(l)<---> HCO3-(aq) + H3O+(aq)

Determine the pH of a solution that is 6.39 10-4 M in H2CO3.

Answer 1

Just take the log(10) of the concentration.

pH = - log(concentration of H+) = 3.1945

(BTW pH stands for power of Hydrogen)