Solve the problem.
-A chemist needs 130 milliliters of a 35% solution but has only 5% and 70% solutions available. Find howmany milliliters of each that should be mixed to get the desired solution.

Question

Quizplus · Accepted Answer

Using the method of alligation, the ratio of the two solutions to be mixed can be calculated as follows: (70% - 35%)/(35% - 5%) = 35/30 = 7/6. This means for every 7 parts of the 70% solution, 6 parts of the 5% solution are needed. The total parts needed are 7+6=13 parts. Since the total solution needed is 130 mL, each part is 130 mL / 13 = 10 mL. Therefore, 70 mL of the 70% solution (7 parts) and 60 mL of the 5% solution (6 parts) are needed.

Solve the Problem. -A Chemist Needs 130 Milliliters of a 35% Solution but 35