Question

0.1mol nacl dissolved in 100g water mole fraction of nacl

Answer 1

Answer: 0.017

Explanation:

Mole fraction of solute is the ratio of moles of solute to the total number of moles.

Moles can be calculated by using the formula:

$\text{no of moles}=\frac{\text{given mass}}{\text{Molecular mass}}$

Moles of water=$\frac{100g}{18g/mol}=5.55moles$

Given : Moles of $NaCl$ = 0.1

$\text{Mole fraction of NaCl}=\frac{\text{Moles of NaCl}}{\text{Moles of NaCl}+\text{Moles of }H_2O}$

$\text{Mole fraction of NaCl}=\frac{0.1}{0.1+5.55}=0.017$

Answer 2

Answer:

Mole fraction of solute is the ratio of moles of solute to the total number of moles.

Moles can be calculated by using the formula:

\text{no of moles}=\frac{\text{given mass}}{\text{Molecular mass}}no of moles=

Molecular mass

given mass

Moles of water=\frac{100g}{18g/mol}=5.55moles

18g/mol

100g

=5.55moles

Given : Moles of NaClNaCl = 0.1

\text{Mole fraction of NaCl}=\frac{\text{Moles of NaCl}}{\text{Moles of NaCl}+\text{Moles of }H_2O}Mole fraction of NaCl=

Moles of NaCl+Moles of H

2

O

Moles of NaCl

\text{Mole fraction of NaCl}=\frac{0.1}{0.1+5.55}=0.017Mole fraction of NaCl=

0.1+5.55

0.1

=0.017