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;
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