SOLUTION: If we want 25 mL of 18% alcohol diluted from 70% alcohol, we must do two steps: a) Solve this equation for x: 70% x = 18% (25 mL) x is the amount (in mL) of 70% alcohol needed.

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Question 838671: If we want 25 mL of 18% alcohol diluted from 70% alcohol, we must do two steps:
a) Solve this equation for x: 70% x = 18% (25 mL)
x is the amount (in mL) of 70% alcohol needed.
b) You want a total of 25 mL solution, so now subtract x from 25mL to determine the
amount of water needed.
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi,

25 mL of 18% alcohol(82% water) diluted from 70% alcohol(30% water)

Let x represent the ml of water added to do this

          water = water

 

        

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