Determine the mass fraction of salt in the solution if it is known that 500 g of it contains 120 g of potassium nitrate.
| September 18, 2021 | education
m (KNO3) = 120 g.
m solution = 500 g.
Determine the mass fraction of salt in this solution. We write down the resulting solution.
We use the following formula.
W (KNO3) = m r.v / m r-ra * 100%.
Substitute the known values into this expression.
W = 120/500 * 100% = 24%.
This means that the mass fraction of salt in this solution is 24 percent.
Answer: the mass fraction of salt is 24 percent.
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