6. A water sample contains 9.5 % MgCl2 and 11.7% NaCl by mass Assuming 80% ionisation of each , find the Boiling point of water sample (Boling point of pure water is 100 ^° C

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

M g C l_{2}

by weight of solution. Calculate it's boiling point assuming 80% ionisation for NaCl and 50% ionisation of

M g C l_{2}

(K_{b} (H_{2} O)

= 0.51 kgm :

Q. River water is found to contain

11.7 %

N a C l

9.5 %

M g C l_{2}

, and

8.4 %

N a H C O_{3}

by weight of solution. Calculate its normal boiling point assuming

90 %

ionization of

N a C l

70 %

ionization of

M g C l_{2}

and

50 %

ionization of

N a H C O_{3}

(

K_{b}

for water

= 0.52

m o l^{- 1}

kg).

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

M g C l_{2}

by weight of solution. Calculate its normal boiling point assuming 80 per ionisation for NaCl and 50 per ionisation of

M g C l_{2} [M_{b} (H_{2} O) = 0.51 k g m o l^{- 1} K]

Calculate the normal freezing point of a sample of sea water containing 3.8 % nacl and 0.12 % of mgcl2 by mass given kf = 1.86 K kg/ mol molar mass of nacl 58.5 and mgcl2 95 g/mol

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