1.

K_(a_(1)), K_(a_(2)) and K_(a_(3)) are the respective ionisation constants for the following reactions.H_(2)S hArr H^(+)+HS^(-)HS^(-)hArr H^(+)+S^(2-)H_(2)S hArr 2H^(+)+S^(2-)The correct relationship between K_(a_(1)), K_(a_(2)) and K_(a_(3)) is

Answer»

`K_(a_(3))=K_(a_(1))XX K_(a_(2))`
`K_(a_(3))=K_(a_(1))=K_(a_(1))+K_(a_(2))`
`K_(a_(3))=K_(a_(1))-K_(a_(2))`
`K_(a_(3))=K_(a_(1))//K_(a_(2))`

Solution :`K_(a_(3))=([H^(+)]^(2)[S^(2-)])/([H_(2)S])`
`=([H^(+)][HS^(-)])/([H_(2)S])xx([H^(+)][S^(2-)])/([HS^(-)])=K_(a_(1))xx K_(a_(2))`


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