KCET · Chemistry · Solutions
Among the following 0.1 m aqueous solutions, which one will exhibit the lowest boiling point elevation, assuming complete ionization of the compound in solution?
- A Aluminium chloride
- B Aluminmium sulphate
- C Potassium sulphate
- D Sodium chloride
Answer & Solution
Correct Answer
(D) Sodium chloride
Step-by-step Solution
Detailed explanation
\(\Delta \mathrm{T}_{\mathrm{b}} \propto \mathrm{i}\)
(1) \(\mathrm{AlCl}_3 \quad \mathrm{i}=4\)
(2) \(\mathrm{Al}_2\left(\mathrm{SO}_4\right)_3 \quad \mathrm{i}=5\)
(3) \(\mathrm{K}_2 \mathrm{SO}_4 \quad \mathrm{i}=3\)
(4) \(\mathrm{NaCl} \quad \mathrm{i}=2 \quad\) (Lowest Boiling)
(1) \(\mathrm{AlCl}_3 \quad \mathrm{i}=4\)
(2) \(\mathrm{Al}_2\left(\mathrm{SO}_4\right)_3 \quad \mathrm{i}=5\)
(3) \(\mathrm{K}_2 \mathrm{SO}_4 \quad \mathrm{i}=3\)
(4) \(\mathrm{NaCl} \quad \mathrm{i}=2 \quad\) (Lowest Boiling)
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