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Answer :
Final answer:
To make 8 oz. of a 50% solution of Isopropyl Alcohol (IPA), you would need 3.2 oz of 70% IPA and 4.8 oz of water.
Explanation:
To calculate the amount of 70% IPA and water needed to make 8 oz. of a 50% solution of Isopropyl Alcohol (IPA), we need to use the formula:
(% solution A)(volume of solution A) + (% solution B)(volume of solution B) = (% desired solution)(total volume of solution)
Let x be the volume of the 70% IPA and y be the volume of water. We can set up two equations:
- 0.70x + 0y = 0.50(8 oz)
- x + y = 8 oz
Solving these equations gives us x = 3.2 oz and y = 4.8 oz. Therefore, the correct answer is a) 3.2 oz of 70% IPA and 4.8 oz of water.
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