For the indicator HIn the ratio (Ind^(Θ)...

For the indicator `HIn` the ratio `(Ind^(Θ))//(HIn)` is `7.0` at `pH` of `4.3`. What is `K_(eq)` for the indicator.

`3.5xx10^(-4)`

`3.5xx10^(-5)`

`3.5xx10^(-2)`

`3.5xx10^(-3)`

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