What is the mass of water required to prepare 5.25 kg of 15.0% calcium nitrate solution?

Question

Quizplus · Accepted Answer

To prepare a 15.0% calcium nitrate solution, the mass of calcium nitrate (Ca(NO3)2) must be 15.0% of the total solution mass. The total solution mass is 5.25 kg. Therefore, the mass of calcium nitrate is 15.0% of 5.25 kg, which is 0.7875 kg (or 787.5 g). The mass of water required is the total mass of the solution minus the mass of calcium nitrate, which is 5.25 kg - 0.7875 kg = 4.4625 kg, rounded to 4.46 kg.

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