A common antiseptic is 2% hydrogen peroxide. How much antiseptic can be made from 80g of hydrogen peroxide?

Answer 1

Assuming that the 2% hydrogen peroxide is mass/volume, then we can proceed as follows:

2 % = 2 g per 100 mls of solution

2 g/100 ml = 80 g/x mls and x = 1000 mls or 1 liter can be made

If the 2% hydrogen peroxide were volume/volume, or mass/mass, then we would need to know the density of the 2% solution.