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QA chemist has one solution that is 30% pure salt and another is 60% pure salt

A chemist has one solution that is 30% pure salt and another is 60% pure salt. How many ounces of each solution must ne use to produce 60 ounces of a solution that is 50% pure salt?

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#1keyonAnswered at 2013-03-31 18:46:53
Do it like this: how many liters of a 70% acid solution must be mixed with a 15% acid solution to get 385L of a 60% acid solution? ------------------- s = amount of 70% f = amount of 15% ------- s + f = 385 (total solution) 0.7s + 0.15f = 0.6*385 (total acid) ------- f = 385 - s Sub for f in 2nd equation 0.7s + 0.15(385-s) = 231 70s + 5775 - 15s = 23100 55s = 17325 s = 315 liters of 70% ------------ f = 70 liters of 15%
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A chemist has one solution that is 30% pure salt and another is 60% pure salt

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