Treesia prepared by dissolving 31.3 g of the unknown weak acid HA in 1 L of water o has ph = 2.35. Knowing that the 0.2 Me NaA salt solution has a pH of 8.65 and is acidic consists of 3.2% H, 204% 0, 22.7% CI and 53.7% C, determine: a) the empirical and true formula of the acid HA: b) the acidity constant (K.) and the degree of combination (a) of the acid weak HA; e) the elevation temperature of the 0.2 M solution of this acid. Kng is given for water