Question

4.0g caustic soda (NaOH) is dissolved in 90g water.Calculate the mole fraction of caustic soda?

Answer 1

Answer:

Explanation:

Molefraction of caustic soda(NaOH)=

no.of moles NaOH/total no.of moles

NaOH moles= given weight/GMW

= 4/40

= 0.1 moles

Water moles= 90/18

=5

Molefraction of NaOH= 0.1/0.1+5

=0.1/5.1

=1/51

=0.019