6. Part 1: Calculate the concentration of each species present in a 0.050-M solution of H2S. (Ka1 = 1.1 x 10^-7 and Ka2 = 6.2 x 10^-8)
Part 2: Calculate the pH of a buffer solution prepared from 0.155 mol of phosphoric acid, (Ka1= 7.52 x 10^-3 just use Ka1) 0.250 mole of KH2PO4, and enough water to make 0.500 L of solution.
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