To 400 g of a solution containing 30% calcium nitrate was added 600 mg of water.
| July 25, 2021 | education
To 400 g of a solution containing 30% calcium nitrate was added 600 mg of water. Determine the content of calcium nitrate in the resulting solution.
The mass fraction of a solute is the ratio of the mass of the solute to the total mass of the solution.
Mass of calcium nitrate in the initial solution:
400 * 0.3 = 120 (g).
The mass of the resulting solution:
400 + 600 = 1000 (g).
The content of calcium nitrate in the resulting solution:
(120/1000) * 100% = 12%.
Answer: 12%.
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