What happens when AgCl is dissolves in excess of KCN solution

Explanation

To solve the question of what happens when AgCl is dissolved in excess of KCN solution, we can follow these steps:

### Step 1: Identify the Reactants
We start with silver chloride (AgCl) and potassium cyanide (KCN).

### Step 2: Write the Reaction
When AgCl is mixed with KCN, a reaction occurs where AgCl interacts with the cyanide ions (CN⁻) present in KCN.

### Step 3: Formation of Complex
The silver ion (Ag⁺) from AgCl reacts with the cyanide ions to form a complex ion. The reaction can be represented as follows:

\[ \text{AgCl} + 2 \text{KCN} \rightarrow \text{K}_2[\text{Ag(CN)}_2] + \text{KCl} \]

### Step 4: Write the Balanced Equation
The balanced chemical equation for the reaction is:

\[ \text{AgCl} + 2 \text{KCN} \rightarrow \text{K}_2[\text{Ag(CN)}_2] + \text{KCl} \]

### Step 5: Conclusion
Thus, when AgCl is dissolved in excess KCN, it forms a complex ion, specifically the dicyanoargentate complex \([Ag(CN)_2]^-\), along with potassium chloride (KCl).

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