1.

pH of soluiotn obtained by mixing 50ml of 0.1M Na_(2)CO_(3) solution and 50 ml of 0.05 M HCl solution is where K_(a_(1)) and K_(a_(2)) are first and second dissociation constants of H_(2)CO_(3) respectively.

Answer»

`( pKa_(a_(1))+pK_(a_(2)))/(2)`
`pK_(a_(2)) - log_(10) 2`
`pK_(a_(2))`
`pK_(a_(1))= log_(10) 2`

Answer :C


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