Find the mass of potassium silicate that is formed by fusing silicon oxide with 280g of potassium hydroxide.
| March 23, 2021 | education
SiO2 + 2KOH = K2SiO3 + H2O.
Potassium hydroxide reacts in an amount of 280 g: 56 g / mol = 5 mol. Silicate is obtained, as can be seen from the reaction equation, 2 times less, 2.5 mol.
The molar mass of K2SiO3 is 39 * 2 + 28 + 16 * 3 = 154 g / mol.
The mass of the resulting salt is: 2.5 mol * 154 g / mol = 385 g.
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