Which of the following solutions will have the highest concentration of bromide ions?

• A. 0.10 M NaBr
• B. 0.10 M CaBr₂
• C. 0.10 M AlBr₃
• D. 0.05 M MnBr₄

Answer: (C)

Verified step by step guidance

1. Identify the chemical formula for each compound to determine the number of bromide ions produced per formula unit. NaBr produces 1 bromide ion, CaBr2 produces 2 bromide ions, AlBr3 produces 3 bromide ions, and MnBr4 produces 4 bromide ions.
2. Calculate the concentration of bromide ions for each solution by multiplying the molarity of the solution by the number of bromide ions produced per formula unit. For example, for NaBr, the concentration of bromide ions is 0.10 M * 1 = 0.10 M.
3. Perform the same calculation for CaBr2: 0.10 M * 2 = 0.20 M bromide ions.
4. Calculate the concentration for AlBr3: 0.10 M * 3 = 0.30 M bromide ions.
5. Calculate the concentration for MnBr4: 0.05 M * 4 = 0.20 M bromide ions. Compare all the calculated concentrations to determine which solution has the highest concentration of bromide ions.