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In a solution of 0.04 M FeCI(2),0.02 MFe...

In a solution of `0.04 M FeCI_(2),0.02 MFeCI_(3)` and `0.01 M-HCI` how, large may be its pH without there being precipitation of either `Fe(OH)_(2)` or `Fe(OH)_(3) ? K_(sp)` are `8 xx 10^(-16)` for `Fe(OH)_(2)` and `4 xx 10^(-28)` for `Fe(OH)_(3)`. (Given your answer excluding the decimal places).

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