What mass of potassium hydroxide is formed by the interaction with water of 4.7 grams of potassium oxide?
| August 5, 2021 | education
1. We make a chemical equation, not forgetting to put down the coefficients:
K2O + H2O = 2KOH.
2. Find the amount of substance K2O:
n (K2O) = m / М = 4.7g / 94 g / mol = 0.05 mol.
3. Find the amount of substance KOH:
n (KOH) = 0.05 * 2 = 0.1 mol.
4. Find the mass of KOH:
m (KOH) = n * M = 0.1 mol * 56 g / mol = 5.6 g.
Answer: m (KOH) = 5.6g (3).
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