Household bleach is an aqueous solution that contains 5.25g of sodium chlorite, NaOCl (aq), per 100.0mL of solution. What is the molar concentration of sodium hypochlorite in bleach?

1 answer

5.25 g/100 mL solution = 52.5 g/1000 mL solution.
mols NaOCl in 52.5 g = mols/molar mass = 52.5/74.5 = 0.705 mols/L = 0.705 M By the way, NaOCl is sodium HYPOchlorite. Sodium chlorite is NaClO2.