Questions: Classify each ionic compound as insoluble or soluble in water. Select the single best answer for each part.
Note: Reference the General solubility rules for ionic compounds in water table for additional information.
Part 1 of 4
K2SO4
soluble
insoluble
Part 2 of 4
PbBr2 soluble
insoluble
Part 3 of 4
Zn(OH)2
soluble
insoluble
Part 4 of 4
Bi(NO3)3 soluble
insoluble
Transcript text: Classify each ionic compound as insoluble or soluble in water. Select the single best answer for each part.
Note: Reference the General solubility rules for ionic compounds in water table for additional information.
Part 1 of 4
\[
\mathrm{K}_{2} \mathrm{SO}_{4}
\]
soluble
insoluble
Part 2 of 4
$\mathrm{PbBr}_{2}$ soluble
insoluble
Part 3 of 4
\[
\mathrm{Zn}(\mathrm{OH})_{2}
\]
soluble
insoluble
Part 4 of 4
$\mathrm{Bi}\left(\mathrm{NO}_{3}\right)_{3}$ soluble
insoluble
Solution
Solution Steps
Step 1: Determine the Solubility of \(\mathrm{K}_{2} \mathrm{SO}_{4}\)
Potassium sulfate (\(\mathrm{K}_{2} \mathrm{SO}_{4}\)) contains the potassium ion (\(\mathrm{K}^+\)). According to the general solubility rules, all compounds containing alkali metal ions (such as \(\mathrm{K}^+\)) are soluble in water.
Step 2: Determine the Solubility of \(\mathrm{PbBr}_{2}\)
Lead(II) bromide (\(\mathrm{PbBr}_{2}\)) contains the lead ion (\(\mathrm{Pb}^{2+}\)) and bromide ions (\(\mathrm{Br}^-\)). According to the solubility rules, most bromides are soluble, except those of lead, silver, and mercury. Therefore, \(\mathrm{PbBr}_{2}\) is insoluble in water.
Step 3: Determine the Solubility of \(\mathrm{Zn}(\mathrm{OH})_{2}\)
Zinc hydroxide (\(\mathrm{Zn}(\mathrm{OH})_{2}\)) contains the hydroxide ion (\(\mathrm{OH}^-\)). According to the solubility rules, most hydroxides are insoluble, except those of alkali metals and \(\mathrm{Ba(OH)_2}\). Therefore, \(\mathrm{Zn}(\mathrm{OH})_{2}\) is insoluble in water.