SOLUTION: How much water should be added to 12 mL of 8% alcohol solution to reduce the concentration to 6%?

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Question 1208155: How much water should be added to 12 mL of 8% alcohol solution to reduce the concentration to 6%?
Found 2 solutions by ikleyn, timofer:
Answer by ikleyn(52781) (Show Source):
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How much water should be added to 12 mL of 8% alcohol solution to reduce the concentration to 6%?
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Your original solution contains 0.08 * 12 = 0.96 mL of pure alcohol. You want to have the new total volume V such that 0.96 mL of pure alcohol make the concentration 0.06. Write an equation saying that 0.06 of V is 0.96 0.06*V = 0.96. Solve it and find V V = 0.96/0.06 = 16 mL. So, the original volume is/was 12 mL; new volume should be 16 mL. Hence, 16 - 12 = 4 mL of water should be added. ANSWER. 4 mL of water should be added. CHECK. = 0.06, correct.

Solved.

Answer by timofer(104) (Show Source):
You can put this solution on YOUR website!
volume and concentration before and volume and concentration after
must give the same amount of dissolved material.

and then

the final volume; but how much water to add to get there, .
Add 4 mL.

SOLUTION: How much water should be added to 12 mL of 8​% alcohol solution to reduce the concentration to 6​%?

SOLUTION: How much water should be added to 12 mL of 8% alcohol solution to reduce the concentration to 6%?