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Q: How much water must be added to 300 liters of a solution so that its concentration change from 25 percent to 20 percent?

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10 liters.

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Mixing 80 liters of 15% solution and 520 liters of 90% solution will give 600 liters of 80% solution.

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A pharmacist mixed a 20 percent solution with a 30 percent solution to obtain 100 liters of a 24 percent solution. How much of the 20 percent solution did the pharmacist use in the mixture (in liters).

The concentration is 2 M.

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The concentration is 2 M.

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mary mixed 2l of an 80% acid solution with 6l of a 20% acid solution. what was the percent of acid in the resulting mixture

Concentration of a solution is recorded in molarity (M). Molarity is the moles of solute divided my liters of solution. So to find the concentration of a solution, calculate the number of moles of the solute (the chemical being dissolved) and measure the number of liters of the solution (the water), then divide them.

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