1.

What is the ratio of uncomplexed to complexed Zn^(2+) ion in a solution that is 10 M in NH_(3), if the stability constant of [Zn(NH_(3))_(4)]^(2+) is 3XX10^(9) ?

Answer»

`3.3xx10^(-9)`
`3.3xx10^(-11)`
`3.3xx10^(-14)`
`3xx10^(-13)`

SOLUTION :`3xx10^(9)=([Zn(NH_(3))_(4)^(2+)])/([Zn^(2+)])xx(1)/(10^(4))`
`IMPLIES ([Zn^(2+)])/([Zn(NH_(3))_(4)^(2+)])=3.3xx10^(-14)`


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