As a result of the interaction of potassium hydroxide and hydrochloric acid, water with a mass of 18 g was formed. calculate the mass of potassium hydroxide taken.
Potassium hydroxide forms salt and water with hydrochloric acid.
KOH + HCl = KCl + H2O.
The number of moles of all components of the reaction will be equal.
n (H2O) = m / Mr = 18 g / 18 g / mol = 1 mol.
n (H2O) = n (KOH) = 1 mol.
The mass of the reacted potassium hydroxide.
m (KCl) = 1 mol • 56 g / mol = 56 g.
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