Question

Calculate the molarity of a solution containing 40g of naoh dissolved in 2 litres of solution

Answer 1

Answer:

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Explanation:

Answer 2

We have to find the molarity of a solution containing 40 g of NaOH dissolved in 2 litres of solution.

solution : molarity is the no of moles of solute per unit volume of solution.

in short, it is the ratio of no of moles of solute to the volume of solution.

here, mass of NaOH = 40g

no of moles of NaOH (solute)  = mass of NaOH/molar mass of NaOH

= $\bf{\frac{40g}{40g/mol}}$ = 1 mol

here, volume of solution = 2 litres.

so the molarity of the solution = no of moles of solute/volume of solution

= $\bf{\frac{1mol}{2litres}}$

= 0.5 M

therefore the molarity of the NaOH solution is 0.5M.