The slaked lime was affected by 3.15 g of pure nitric acid. What mass of calcium nitrate will be obtained?

Slaked lime is calcium hydroxide Ca (OH) 2. The substance received this name due to the fact that it is formed as a result of “slaking” quicklime – CaO.

Because slaked lime is a hydroxide, then it will react with acid according to a neutralization scheme: with the formation of medium salt and water. The equation can be written as:

Ca (OH) 2 + 2 HNO3 = Ca (NO3) 2 + 2 H2O

Molar masses of substances:

M (HNO3) = 63 g / mol;

M (Ca (NO3) 2) = 164 g / mol.

Let’s make a proportion according to the reaction equation:

3.15 g of nitric acid corresponds to X g of calcium nitrate, as

2 * 63 g / mol of nitric acid corresponds to 164 g / mol of calcium nitrate.

X = (3.15 * 164) / (2 * 63) = 4.1 g

Answer: The mass of calcium nitrate is 4.1 g.