Derive the simplest salt formula, if the mass fractions of the elements that make up potassium
| September 25, 2021 | education
Derive the simplest salt formula, if the mass fractions of the elements that make up potassium are known – 39.69%, manganese – 27.87%, oxygen – 32.46%
Let’s denote the unknown salt formula as KxMnyOz.
Let’s compose the ratio of the percentage to molar mass.
KxMnyOz = 39.69 / 39.1: 27.87 / 54.94: 32.46 / 16 = 1.02: 0.51: 2.03.
Let’s round up to a whole number, dividing by the smallest value – 0.51.
KxMnyOz = 2: 1: 4.
So the formula of the substance K2MnO4 is potassium manganate.
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