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K(a) for the ionisation of Fe^(3+) to Fe...

`K_(a)` for the ionisation of `Fe^(3+)` to `Fe(OH)^(2+)` and `H^(o+)` is `6.5 xx 10^(-3)`, what is the maximum `pH` value which could be used so that at least `95%` of the total `Fe^(3+)` in a dilute solution exists as `Fe^(3+)`?

A

0.608

B

2.908

C

1.508

D

0.908

Text Solution

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The correct Answer is:
D
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