Question 213074
how much distilled water should be added to 100 ml of a highly concentrated 90% saline solution to reduce the concentration to 40%? what is the volume of the resulting mixture?
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100 ml of 90% salt contains 90 ml of salt.
To add water to make that 90 ml 40% of the solution:
90 ml = 40%
9 ml = 4%
times 25
225 ml = 100%
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125 ml of water has to be added