Question

How many mL of a 2% solution will result from the dilution of 20mL of a 10% solution? The answer is 100, but I can't figure out.

Answer 1

Take a look at the explaination...

Explanation:

The more water you give to a solution, the less the concentration will be (delution). Therefore, it is antiproportional.
If
`10% = 20ml`
`1% = 200ml`
`2% = 100ml`