Multiple choice

How much water must be added to 50 ml of alcohol to make a solution that contains 50% alcohol?

  1. 5 ml

  2. 10 ml

  3. 15 ml

  4. 50 ml
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

To make 50% alcohol solution from 50ml pure alcohol, we need equal quantities of alcohol and water. Current solution has 50ml alcohol and 0ml water. To reach 50% concentration, add 50ml water. Total becomes 100ml with 50ml alcohol = 50%.

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