SOLUTION: You need a 25% alcohol solution. On hand, you have a 100 mL of a 70% alcohol mixture. How much pure water will you need to add to obtain the desired solution? A) Write an equati

Question 916099: You need a 25% alcohol solution. On hand, you have a 100 mL of a 70% alcohol mixture. How much pure water will you need to add to obtain the desired solution?
A) Write an equation using the information as it is given above that can be used to solve this problem. Use x as your variable to represent the amount of pure water you need to use.
Equation:_______________________________
B) You will need____mL of pure water
c)to obtain____mL of the desired 25% solution.
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Let u = volume of water to add.

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