Calculate the mass fraction of potassium in sylvinite?
| September 24, 2021 | education
Determine the mass fraction of potassium in sylvinite. We write down the solution.
First, we write down the sylvinite formula.
KCl * NaCl.
To solve the problem, we use the following formula.
We = Ar e * n / Mv-va * 100%.
Where W is the mass fraction of the element.
Are is the atomic mass of an element.
Mv-va is the molar mass of a substance.
n is the number of atoms of an element in a compound molecule.
Ar (K) = 39 g / mol.
M (c – va) = 39 + 35.5 + 23 + 35.5 = 133 g / mol.
Next, we substitute the known values into the formula.
W = 39/133 * 100 = 29.3%.
The mass fraction of potassium in sylvinite is 29.3 percent.
Answer: W = 29.3%.
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