alleryStart learning →The van't Hoff factor i for a strong electrolyte like CaCl2 (full dissociation) is:
- 3
- 4
- 1
- 2
Show answer and solution
Correct answer: A. 3
CaCl2 → Ca²⁺ + 2Cl⁻, giving 3 ions per formula unit.
**So i = 3. For NaCl, i = 2. For Al2(SO4)3, i = 5.**
Indian Navy INET Reactions in Aqueous Solution — practice questions
Explore 2 free Reactions in Aqueous Solution questions in Indian Navy INET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.
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Worked practice questions
For solution of urea (M_w = 60 g/mol) with 6 g in 100 g water, molality:
- 1 m
- 6 m
- 1 m (= 6/60 / 0.1 kg water)
- 0.1 m
Show answer and solution
Correct answer: C. 1 m (= 6/60 / 0.1 kg water)
Moles urea = 6/60 = 0.1 mol.
Kg water = 0.1. Molality = 0.1/0.1 = 1 mol/kg.
ΔT_f = 1.86 × 1 = 1.86 K (freezing pt = -1.86°C).
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