Homework Help: Chemistry

Posted by Dewa on Saturday, October 29, 2011 at 2:01am.

1000 g of a 50% (mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution. How many liters of water should be added to the starting solution? Please show me the detail answer

Chemistry - DrBob222, Saturday, October 29, 2011 at 12:55pm
The dilution formula works as well for percent by mass as it does for molarity and normality.
%1 x grams1 = %2 x grams2.
Calculate grams 2, then subtract mass HNO3 in the 50% soln to see how much water to add.

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