Question 1184055: How many milliliters of pure water must a nurse mix with 450ml of a 6% saline solution to lower the solution to 5% saline? Answer by ikleyn(52781) (Show Source):
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How many milliliters of pure water must a nurse mix with 450ml of a 6% saline solution to lower the solution to 5% saline?
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There are 0.06*450 = 27 grams of dissolved salt in the original mixture.
This amount of salt does not change, when we add water to the mixture.
So, the new volume V must satisfy = 0.05 grams/mL, or V = = 540 milliliters.
It means that 540 ml - 450 mL = 90 mL of water must be added. ANSWER
