Question

Calculate the molarity and normality of solution containing 40 g of naoh dissolved in two litres of the solution.

Answer 1

but I am not 100% confirm. by the way what is the answer

Answer 2

The answer is 0.5M

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

= 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

= 1 mol/2 litres

= 0.5 M

Therefore the molarity of the NaOH solution is 0.5M.

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