Question

Give molarity of solution containing 4 gm NaOH in 5 ltr. aq. solution.​

Answer 1

Answer:

Molarity = Number of moles / Amount of solution ( In liters)

NaOH molar mass = 23 + 16 + 1 = 40 g

=> Number of moles in 4 g = 4 g / 40 g = 0.1 mole

Amount of water = 0.5 liters

Molarity = 0.1 Mole / 0.5 Litres

=> Molarity = 0.2 M

Explanation:

Answer 2

Answer:

Molarity = Number of moles / Amount of solution ( In liters)

NaOH molar mass = 23 + 16 + 1 = 40 g

=> Number of moles in 4 g = 4 g / 40 g = 0.1 mole

Amount of water = 0.5 liters

Molarity = 0.1 Mole / 0.5 Litres

=> Molarity = 0.2 M