Question

using solubility guidelines, predict whether each of the following compounds is soluble or insoluble in water: znso₄, mgbr₂, sr(oh)₂, pbi₂, (nh₄)₂co₃

Explanation:

Step1: Analyze ZnSO₄

Sulfates of most metals are soluble, and zinc sulfate ($ZnSO_{4}$) is no exception.

Step2: Analyze MgBr₂

Bromides of most metals are soluble, so magnesium bromide ($MgBr_{2}$) is soluble.

Step3: Analyze Sr(OH)₂

Hydroxides of Group - 2 metals like strontium ($Sr$) are moderately soluble, and $Sr(OH)_{2}$ is soluble.

Step4: Analyze PbI₂

Iodides of most metals are soluble, but lead iodide ($PbI_{2}$) is an exception and is insoluble.

Step5: Analyze (NH₄)₂CO₃

Salts of ammonium ($NH_{4}^{+}$) are always soluble, so ammonium carbonate ($(NH_{4})_{2}CO_{3}$) is soluble.

Answer:

Soluble: $ZnSO_{4}$, $MgBr_{2}$, $Sr(OH)_{2}$, $(NH_{4})_{2}CO_{3}$
Insoluble: $PbI_{2}$