Answer
$K_{sp} = [Cu^+][Br^-]$
Work Step by Step
1. Identify the ions, and write the equilibrium reaction for the dissociation of the salt $(CuBr)$:
- $Cu^+$ and $Br^-$
- $CuBr(s) \lt -- \gt Cu^+(aq) + Br^-(aq)$
2. Balance the reaction:
- $1 CuBr(s) \lt -- \gt 1Cu^+(aq) + 1Br^-(aq)$
3. Write the $K_{sp}$ expression:
- Multiply the concentrations of the ions.
- The balancing coefficients are used to determine the exponents of the concentrations.
- $K_{sp} = [Cu^+]^1 \times [Br^-]^1$
