# The density 10.5 molal of #NaOH# solution is 1.33 gmL-1. How do you calculate mole fraction of #NaOH#?

##### 1 Answer

Jul 7, 2016

#### Answer:

The mole fraction of NaOH is 0.159.

#### Explanation:

A 10.5 mol/kg solution of NaOH contains 10.5 mol NaOH and 1 kg of water.

The formula for mole fraction

#color(blue)(|bar(ul(color(white)(a/a)x = "moles of component"/"total moles"color(white)(a/a)|)))" "#

∴