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2021-06-17

How many ounces of pure water must be added to 50 oz of a 15% saline solution to make a saline solution that is 10% salt?

How many ounces of pure water must be added to 50 oz of a 15% saline solution to make a saline solution that is 10% salt?

50 ounces of 15% saline solution contains 0.15*50 = 7.5 ounces of salt. Let x be the amount of pure water you add to this solution. Then you end up with (x + 50) ounces of this new solution.

How much water should be added to 20 ounces of a 15% solution of alcohol to dilute it to a 10% solution?

= 20+w, or 30 = 20 + w, which implies w = 10. Answer. 10 ounces of water must be added.

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