Calculate the mass of calcium hydroxide obtained by interaction with water of calcium oxide weighing 11.2 g

When calcium oxide reacts with water, calcium hydroxide is formed. The reaction is described by the following equation:

CaO + H2O = Ca (OH) 2;

One mole of calcium oxide forms one mole of calcium hydroxide.

Find the molar amount of calcium oxide.

Its molar mass is M CaO = 40 + 16 = 56 grams / mol;

The amount of substance in 11.2 grams will be N CaO = 11.2 / 56 = 0.2 mol;

Let’s find the molar mass of calcium hydroxide.

M Ca (OH) 2 = 40 x (16 + 1) x 2 = 74 grams / mol;

Find the mass of 0.2 mol of calcium hydroxide.

m Ca (OH) 2 = 74 x 0.2 = 14.8 grams;