SOLUTION: How many ml of 40% acid should be added to pure acid to make 40 ml of 45% acid?

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Question 851012: How many ml of 40% acid should be added to pure acid to make 40 ml of 45% acid?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
This is just a different example of the same general problem as explained (but not fully solved) in here:

Percent w/v Mixture, unknown quantities to use, known conc and quantity of result

If the example is percents volume per volume, you simply not need the densities.