A solution of sodium sulphate contains 92 g of Na+ ions per kilogram of water. The molality of Na+ ions in that…
Solutions · Class 12 · JEE Main Previous Year Question
A solution of sodium sulphate contains 92 g of ions per kilogram of water. The molality of ions in that solution in mol kg⁻¹ is:
- a
16
- b✓
4
- c
12
- d
8
4
Strategy:\n> Molality of ions is calculated as moles of that specific ion per kg of solvent.\n\nStep 1: Calculate moles of } \ce{Na+} \text{\nMass = 92 g. Atomic mass = 23.\n\n\nStep 2: Calculate molality\nSolvent mass = 1 kg.\n\n\n
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