Calculate the mass of salt obtained by the interaction of 126 g.

Calculate the mass of salt obtained by the interaction of 126 g. calcium oxide and nitric acid, if the practical yield is 80% of the theoretical.

1. Let’s compose the equation of the chemical reaction:

CaO + 2HNO3 = Ca (NO3) 2 + H2O.

2. Find the chemical amount of calcium oxide:

n (CaO) = m (CaO) / M (CaO) = 126 g / 56 g / mol = 2.25 mol.

3. According to the reaction equation, we find the theoretical chemical amount of calcium nitrate, and at the end its mass:

ntheor (Ca (NO3) 2) = n (CaO) = 2.25 mol.

nprak (Ca (NO3) 2) = ntheor (Ca (NO3) 2) * η (Ca (NO3) 2) / 100% = 2.25 mol * 80% / 100% = 1.8 mol.

m (Ca (NO3) 2) = n (Ca (NO3) 2) * M (Ca (NO3) 2) = 1.8 mol * 164 g / mol = 295.2 g.

Answer: m (Ca (NO3) 2) = 295.2 g.