From 280 g of calcium oxide, 358 g of calcium hydroxide was obtained. Calculate the mass fraction

univerkov | July 1, 2021 | education

From 280 g of calcium oxide, 358 g of calcium hydroxide was obtained. Calculate the mass fraction of the yield of calcium hydroxide.

1. We make a chemical equation, not forgetting to put down the coefficients:

CaO + H2O = Ca (OH) 2.

2. Find the mass of CaO:

m (CaO) = M * n = 56 * 1 = 56g.

3. According to the equation we make up the proportion:

280/56 = 358 / H.

X = (56 * 358) / 280 = 71.6g.

4. Let’s find the mass fraction of calcium hydroxide:

ω (Ca (OH) 2) = 358 / 71.6 = 5%.

Answer: ω (Ca (OH) 2) = 5%.

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