SOLUTION: How much water should be added to 10ml of a 10% acid solution to make it a 5% solution?

Question 923108: How much water should be added to 10ml of a 10% acid solution to make it a 5% solution?
Answer by srinivas.g(540) (Show Source): You can put this solution on YOUR website!
total quantity of solution = 10 ml
quantity of Acid = 10 % of 10 ml
=
= 1 ml
let as assume v ml of water is added to 10ml of a 10% acid solution to make it a 5% solution
total quantity of solution now = (10+v) ml
quantity of acid = 5% of (10+v) ml
=
=
but , quantity of acid remains same even after adding water
so 1 =
multiply with 20 on both sides
1*20 =
20 =10+v
move 10 to the left
20-10 =v
10 =v
quantity of water added = 10 ml
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