What is the molarity (M) of a solution containing 4.0 g of NaOH in 500 mL of solution? (Molar mass of NaOH = 40 g/mol)
- 0.1 M
- 0.2 M
- 0.4 M
- 1.0 M
📝 Batafsil tushuntirish
Moles of NaOH = 4.0 / 40 = 0.1 mol. Volume = 0.5 L.Molarity = 0.1 mol / 0.5 L = 0.2 M.