Question

8g. of NaOH is dissolved in water to prepare 1500 mL solution. Calculation its molar
concentration. (NaOH = 40)​

Answer 1

Answer:

1 mol of NaOH has a mass of 40g. So

Moles of NaOH=1.6g of NaOH×

40gNaOH

1molNaOH

=0.04 mol NaOH

Litres of solution =500ml solution ×

1000mlSolution

1LSolution

=0.5 L Solution

Molarity =

litresofsolution

molesofSolute

=

0.5

0.04

mol/L

=0.08 mol/L