20 g of potassium nitrate was dissolved in 180 g of water. What is the mass fraction of the solute in the solution?
| March 27, 2021 | education
First of all, it is necessary to determine the mass of the entire resulting solution. That is, it is necessary to add the mass of the solution and the mass of water.
m solution = 180 + 20 = 200 g.
Therefore, the mass of the entire solution is 200 g.
Next, you need to determine the mass fraction of the substance in the resulting solution.
In order to determine the mass fraction of sodium hydroxide, it is necessary to divide the mass of sodium hydroxide by the mass of the entire solution.
W = 20/200 * 100 = 10%.
Answer: therefore, the mass fraction of salt in the solution is 10%.
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