Question

For preparing a 50%(mass by volume)
solution of sodium hydroxide, Neha
dissolved 50g of NaOH in 100ml of water
While Mahi dissolved 50g of NaOH in 50
ml of water and Hema dissolved 50g of
NaOH in 150 ml of water. Which one of
them is correct? *
(1 Point)
Neha
Mahi
Hema
none of them was correct​

Answer 1

Answer:

Molarity is a unit of the concentration measuring the number of moles of a solute per litre of solution.

Moles of solute is

40

5

=0.125 moles

Volume of the solution in litres is 100/1000=0.1L

Molarity =

0.1

0.125

=1.25mol L=1.25mol dm

3