10 g of sodium nitrate was dissolved in 250 g of a 15% sodium nitrate solution.
| May 22, 2021 | education
10 g of sodium nitrate was dissolved in 250 g of a 15% sodium nitrate solution. The mass fraction of salt (%) in the resulting solution became equal to.
The mass of the solution is equal to – 250 g.
W – 15%.
Added sodium nitrate – 10 g.
Determine the percentage of sodium nitrate in the resulting solution.
To do this, you must first determine the mass of the solute in the solution.
m r.v = 250 * 0.15 = 37.5 g.
37.5 + 10 = 47.5 g.
Therefore, in the solution there are 47.5 g of sodium nitrate.
Next, we determine the mass of the entire solution.
m solution = 47.5 g + 250 g = 297.5 g.
Next, determine the mass fraction of sodium nitrate in the resulting solution.
W = 37.5 / 297.5 * 100 = 12.6%.
Answer: W = 12.6%.
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