In order to dilute 150ml of a 22% ammonia solution to a concentration of 10%, you can use the dilution formula:
- Where:
- C1 is the initial concentration (22%)
- V1 is the initial volume (150 ml)
- C2 is the target concentration (10%)
- V2 is the target volume, which we want to calculate.
First, we calculate the target volume V2 and then subtract V1 from it to find the volume of water to be added.
Rearranging the formula:
V2 = C1 x V1 \ C2
In your case:
V2 = 22% x 150 \ 10% = 330ml
The target volume of the diluted solution is 330 ml. To go from 150 ml of a 22% ammonia solution to 330 ml of a 10% solution, we calculate the amount of water to be added:
V2 - V1 = 330ml - 150ml = 180ml
Thus, you need to add 180 ml of (distilled) water to the original solution to decrease the concentration to 10%.