How many grams of copper oxide is formed during the decomposition of copper hydroxide2,

univerkov | April 27, 2021 | education

How many grams of copper oxide is formed during the decomposition of copper hydroxide2, weighing 20 grams, if the mass fraction of the output is 85%

Ca (OH) 2 = CaO + H2O

n = m (practical) / m (theoretical) * 100%, therefore m (practical) = m (theoretical) * n / 100%.

n (Ca (OH) 2) = m / M = 20 / (40 + 1 * 2 + 16 * 2) = 20/74 = 0.27 mol.

n (CaO) = 0.27 mol, because ratio of ratios 1: 1.

m (theory) (CaO) = 0.27 * (40 + 16) = 15.12 gr.

m (practical) = 15.12 * 0.85 = 12.85 gr.

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