- #1

- 15

- 0

## Homework Statement

A is a stable powder

B is water

C is the product of the powder being in contact with water.

A is soluble in substance B and for every gram of A 10% is C.

For a concentration of 0.5ppm of C in twenty liters of water how many grams of A do you need?

## The Attempt at a Solution

I went on the assumption that ppm=mg/l.

So 0.5ppm=0.5mg/l, and I would need 10mg for the twenty liters

Which means that I would need 100mg of A.

Is this correct?