Question

sodium hydroxide is extremely soluble in water. At a certain temperature, a saturated solution contains 551g of NaOH (s) per liter of solution.Calculate the molarity of this saturated NaOH (aq) solution.

Answer 1

Answer: 13.776 M

Step-by-step explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

`Molarity=(n)/(V_s)`

where,

n= moles of solute

`V_s` = volume of solution in L = 1 L

moles of solute =
`\frac{\text {given mass}}{\text {molar mass}}=(551g)/(39.997g/mol)=13.776moles`

Now put all the given values in the formula of molarity, we get

`Molarity=(13.776moles)/(1L)=13.776mole/L`

Thus molarity of this saturated NaOH (aq) solution is 13.776 M