Question

While cleaning a toilet, 150 mL of disinfectant solution is poured into a toilet containing 750 mL of water. If the initial concentration of the disinfectant was 3.40 mol/L, determine the new concentration of the solution

Answer 1

So the 3.40 M solution was diluted from 150 mL to 900 mL.
3.40 mol/L x [150/(150+750)] = ? M