Question

Calculate the molarity of solution if 5g NaOH is present in 500 ml solution

Answer 1

Molar mass of NaOH=40g per mole

no. of moles in 5g of NaOH=5/40=0.125

volume of solution=450mL=0.45L

molarity of solution=no.of moles of solute/volume of solution

=0.125/0.45

=0.277777777778=0.28(approx.)