What mass of water should be added to 500 ml of a 30% solution (density = 1.224 g / ml) to get a 5% solution.

univerkov | September 18, 2021 | education

1. Determine the mass of the substance in the solution, knowing the percentage:

1.224 * 500 * 30/100 = 183.6 g.

We denote the mass of the added substance as x, then:

183.6 / (500 + x) = 0.05;

500 + x = 183.6 / 0.05;

500 + x = 3672;

x = 3172.

Answer: 3172 g of water must be added.

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