(i) 1.51 g of NaCl was dissolved in 500g of water and the elveation in boiling point observed to be `0.0514^(@)C`. Calculate the van't . Hoff factor `K_(b)` for water `0.514 K` kg/mol.
(ii) `1.1` g of `CopCl_(2) 6NH_(3)` (mot wt. =267) was dissolved at `100 g"of" H_(2)O`. The freezing point of solution is `0.29^(@)C`. How many moles of solute particies exist in solution for eac mol of soluta introduced ? `K_(f)` for `H_(2)O=1.86^(2) Cm^(-1)`
(iii) 2g of bezoic acid dissolved in 25g of `C_(6)H_(5)^(-)`. shows a deptession in freezing pont equal to `1.62K`. Molal depression constant of benzene is `4.9 ` K mol/kg . What is the percentage association of acid if it dimenzes in solution.

Explanation

(i) `1.937`
(ii) `~~_(^^)`
`(iii) 99.2%`