Calculate the mass of barium hydroxide required to completely neutralize 36.5 g of a 10 percent hydrochloric acid solution.

univerkov | December 8, 2020 | education

2HCl + Ba (OH) 2 = BaCl2 + 2H2O; m (HCl) pure = w * m (solution) = 0.1 * 36.5 = 3.65 grams.
n (HCl) = m (HCl) neat. / m (solution) = 3.65 / 36.5 = 0.1 mol;
n (Ba (OH) 2 = 1/2 n (HCl) = 0.05 mol; (according to the reaction equation); M (Ba (OH)
2 = 171 grams / mol; m (Ba (OH) 2 = n (Ba (OH) 2 * M (Ba (OH) 2 = 0.05 * 171 = 8.55 grams.

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