1.

Calculate the amount of NaCl which must be added to 100 g of water so that the freezing point is depressed by 2 K. For water, K_(f)=1.86K//m.

Answer»


Solution :`NaCl rarrNa^(+)+Cl^(-),i=2, DeltaT_(F)=eK_(f)m, i.e., 2=2xx1.86xxm or m=0.538`
`therefore"AMOUNT of NaCl to bedissolved in 100 G"=(0.538xx100)/(1000)xx58.5g=3.147g.`


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