SOLUTION: I would like to dilute 1 ltr of 85% Phosphoric Acid to 15%. How much water should I add please.

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Question 1088823: I would like to dilute 1 ltr of 85% Phosphoric Acid to 15%. How much water should I add please.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Assuming percents to be mass per mass, then you need these:
85% ----------- 1.689 grams/ml density
15% ----------- 1.0824 grams/ml density


w, mass of water to add
%281000%2A1.689%2A85%29%2F%28w%2B1000%2A1.689%29=15
Solve this to get the MASS of water to use, in grams... and then you can convert into its volume if you wish...



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online ref, https://wissen.science-and-fun.de/chemistry/chemistry/density-tables/density-of-phosphoric-acid/