Determine Whether Each of the Following Compounds is Soluble or Insoluble: Ammonium Sulfide, Copper II Bromide, Lead II Bromide, Silver Sulfide

When it comes to determining the solubility of compounds in water, there are general rules that can help us. Let’s examine each compound individually:

1. Ammonium Sulfide (NH₄₂S): Ammonium compounds are generally soluble in water. Therefore, ammonium sulfide is soluble.
2. Copper II Bromide (CuBr₂): Salts formed with bromide ions are typically soluble, and copper(II) is a common cation that usually dissolves well. Thus, copper(II) bromide is soluble.
3. Lead II Bromide (PbBr₂): While most bromides are soluble, lead(II) bromide is an exception. It has very low solubility in water, making it insoluble.
4. Silver Sulfide (Ag₂S): Sulfides are generally insoluble, and silver is one of the metals that form insoluble sulfides. Therefore, silver sulfide is insoluble.

In summary:

• Ammonium Sulfide: Soluble
• Copper II Bromide: Soluble
• Lead II Bromide: Insoluble
• Silver Sulfide: Insoluble