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Standard XII

Chemistry

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71 Sea water ...

Question

71 Sea water is found to contain 5.85% NaCl and 9.5% MgCl2 by weight of solution. Calculate its normal boiling point assuming 80% ionisation for NaCl and 50% ionisation of MgCl2. Kb for water = 0.51 kg K / mol (i) Tb = 102.3^°C (ii) Tb = 105.3 K (iii) Tb = 110^°C (iv) Tb = 112 K

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= 0.51 kgm :

Q. Sea water is found to contain 5.85 per NaCl and 9.50 per

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