SOLUTION: How many ml of water should be added to 15 ml of a 20% acid solution to produce a 5% acid solution?

Question 709269: How many ml of water should be added to 15 ml of a 20% acid solution to produce a 5% acid solution?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
The water to add is 0% acid. This means it is part of the volume change but not part of the quantity of acid change. ONE variable.

let v be the volume of water to add to the 20% acid. Result of the mixture must be 5% acid.

5v+5*15=15*20
5v=15*20-5*15
5v=15(20-5)
5v=15*15
, ml. of water to add.
RELATED QUESTIONS
How many mL of acid must be added to 50 mL of a 10% acid solution in order to produce a... (answered by lwsshak3)

how many ml of water must be added to 50ml of 75% acid solution to make a 15% acid... (answered by josmiceli)

How many mL of acid must be added to 50mL of a 10% acid solution in order to produce a... (answered by Maths68)

How many mL of a 60% acid solution must be mixed with a 20% acid solution to produce 200... (answered by richwmiller)

How many mL of a 20% acid solution must be added to 40 mL of a 75% acid solution to... (answered by josgarithmetic)

How many ml of 70% acid solution must be added to a 20% acid solution to obtain 100 ml of (answered by richwmiller)

how many ml of 20% acid solution should be added to pure acid to obtain 40 ml of 45% acid (answered by josgarithmetic)

how much of a 14% acid solution should be added to 20 ml of a 8% acid solution to... (answered by josgarithmetic)

How many ml of a 20% acid solution, and how many ml of 5% acid solution would I need to... (answered by addingup)