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H(2)S is bubbled into a 0.2M NaCN soluti...

`H_(2)S` is bubbled into a `0.2M NaCN` solution which is `0.02M` each in `Ag(CN)_(2)^(Theta)` and `Cd(CN)_(4)^(2-)`. If `K_(sp)` of `Ag_(2)S` and `CdS` are `10^(-50)` and `7.1 xx 10^(-28)` and `K` instability for `[Ag(CN)_(2)^(Theta)]` and `[Cd(CN)^(2-)underset(4)']` are `1.0 xx 10^(-20)` and `7.8 xx 10^(-18)`, which sulphide will precipitate first?

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To determine which sulfide will precipitate first when H₂S is bubbled into a 0.2 M NaCN solution containing 0.02 M each of Ag(CN)₂⁻ and Cd(CN)₄²⁻, we will follow these steps: ### Step 1: Determine the Concentration of Ag⁺ and Cd²⁺ Ions 1. **Dissociation of NaCN**: \[ \text{NaCN} \rightarrow \text{Na}^+ + \text{CN}^- \] The concentration of CN⁻ is 0.2 M. ...
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