In Chemistry, the pH of a solution is defined by pH = -log10[H +), where H+ is the hydrogen ion concentration of the solution in moles per liter. At a river, the pH was measured as 2.36 x 10^-7 mol/L. A year later at the same river the pH was measured as 1.41 x 10^-8mol/L. How much did the pH
increased in one year?