When dissolved in 270 g of potassium sulfate water, a solution with a mass fraction of 10% was obtained.
| August 8, 2021 | education
When dissolved in 270 g of potassium sulfate water, a solution with a mass fraction of 10% was obtained. The mass of dissolved K2SO4 is
To find out the mass of dissolved К2SO4 (potassium sulfate), we use the formula: ηр = mK2SO4 / (mK2SO4 + mH2O), where ηр is the mass fraction of the presented solution (ηр = 10% = 0.1); mH2O is the mass of the solvent, water (mH2O = 270 g).
Perform the calculation: ηр = mK2SO4 / (mK2SO4 + mH2O).
0.1 = mK2SO4 / (mK2SO4 + 270).
0.1 * (mK2SO4 + 270) = mK2SO4.
0.1mK2SO4 + 27 = mK2SO4.
27 = mK2SO4 – 0.1mK2SO4.
27 = 0.9mK2SO4.
mK2SO4 = 27 / 0.9 = 30 g.
Answer: The mass of dissolved К2SO4 (potassium sulfate), according to the calculation, is equal to 30 g.
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