How can I calculate the amount of water to add to a liquid for a particular dilution?

Question

I have some muriatic acid, which is 30 per cent v/v HCl. What is a simple calculation to determine how much water to add to a particular volume of the muriatic acid to dilute it to other strengths? The calculation must be usable for any starting percentage and any desired percentage.

Answer 1

Very simple, it's C1V1=C2V2, where
C1=concentration of the starting solution
V1= volume of the starting solution
C2=concentration that you want to end up with
V2=colume that you want to end up with

Good Luck!

Answer 2

As you have got 30% v/v HCl and say You want to get 10% HCl,then proceed as follows:
3 0% HCl * volume say X = 10% HCl * volume say 100 mll;

or Volume of 30% HCL = 10*100/30 ml

or Volume of 30% HCL = 100/3 ml

or Volume of 30% HCL = 33.33 ml

Similarly other percentage of muriatic acid can be prepared.

Answer 3

I always like

Volume1 X Concentration1 = Volume2 X Concentration2