1.

Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH value-

Answer»

LICL
`BaCl_2`
`BeCl_2`
`AlCl_3`

Solution :In aqueous solution, metal cation `(M^(N+))` remains associated with water `[M(H_2O)_x]^(n+)`. The hydrated cation donates proton through the following reaction.
`[M(H_2O)_x]^(n^+)X-1)OH]^(n-1)+H^+(aq)`
A hydrated metal cation in which the cation possesses high charge density has high ability to donate proton. In the GIVEN salts, the charge densities of the cations follow the order `Ba^(2+)
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