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A solution is a mixture of 0.05 M NaCl a...

A solution is a mixture of 0.05 M NaCl and 0.05 M AgI. The concentration of iodide in the solution when AgCl just starts precipitating is equal to:
`(K_(sp)AgCl=1xx10^(-10)M^(2), K_(sp)AgI=4xx10^(-16)M^(2))`

A

`4 xx10^(-5)`

B

`2 xx10^(-8)`

C

`2xx10^(-7)`

D

`8xx10^(15)`

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