Question

Find the molarity of 0.50 l solution containing 9.0 g nacl

Answer 1

Answer: 0.31 moles/L

Explanation:

Given:

Mass of NaCl = 9 g

Volume of Solution = 0.50 L

Molarity: ?

The formula used to calculate Molarity is:

Molarity (M) = Number of moles of solute / Volume of solution in litres

We know,

Number of Moles = Given mass / molar mass

So,

Moles of HCl

= 9 g / (58.44 g/mol )

= 0.154 moles

Therefore,

Molarity

= 0.154 moles / 0.50 L

= 0.31 moles/L