Question

Calculate the mass of naoh required to make 500ml of 0.5m aqueous solution

Answer 1

Calculate the mass of naoh required to make 500ml of 0.5 M aqueous solution

The formula for calculating molarity is:

Molarity (M) = moles of solute/liters of solution

Molarity = 0.5 M
Volume of solution = 500ml = 0.5L

Moles = molarity × liters of solution
           = 0.5 × 0.5 = 0.25moles

0.25 moles of NaOH

Find the mass of 0.25 moles of NaOH

mass = moles × molar mass
         = 0.25 × 40
         = 10g

The mass required of sodium hydroxide to make 500ml of 0.5M aqueous solution is 10 g