SOLUTION: how much quantity of water to be added in 100 kg HF of 70% to make it to HF 60%?

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Question 1115407: how much quantity of water to be added in 100 kg HF of 70% to make it to HF 60%?

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
how much quantity of water to be added in 100 kg HF of 70% to make it to HF 60%?
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Add W kg.
Then,
100*70 + W*0 = (100+W)*60
Solve for W