Question

If 14.6 g if Nacl are dissolved in 250 ml of the solution. Molarity of solution will be?

Answer 1

`1` molar or `1` mole per liter.

Explanation:

Molarity is expressed through the formula,

`c=n/v`

• `c` is the concentration in terms of molarity

• `n` is the number of moles of solute

• `v` is the volume of the solution in liters

We need to find the number of moles of table salt. We do this by dividing the mass by its molar mass, which is `58.4 \ "g/mol"`.

`:.n=(14.6color(red)cancelcolor(black)"g")/(58.4color(red)cancelcolor(black)"g""/mol")=0.25 \ "mol"`

We have the volume of the solution, which is `v=250 \ "mL"=0.25 \ "L"`.

So, the concentration is:

`c=(0.25 \ "mol")/(0.25 \ "L")`

`=1 \ "M"`