Question

A sample of 76 g of NaCl is dissolved to make 1 L of solution. What is the molarity of the solution? Show your work.

Answer 1

1.3005 M

Step-by-step explanation:

Given that,

Mass of NaCl =
`76 \ g`

Molar mass of NaCl=
`22.99+35.45=58.44\ g/mol`

The formula for calculation of moles,

Moles,

`n=(given \ mass)/(molar\ mass)\\n=(76)/(58.44) \ g/mol\\n=1.3005\ g/mol`

Given that volume
`=1\ ltr`

Molarity,

`=(moles\ of\ solute)/(litre\ of\ solution) \\=(1.3005)/(1)\\ =1.3005\ M`

Therefore the molarity is 1.3005 M.