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 K2SO4
Potassium sulfate (K2SO4) contains the potassium ion (K+). According to the general solubility rules, all compounds containing alkali metal ions (such as K+) are soluble in water.
Step 2: Determine the Solubility of PbBr2
Lead(II) bromide (PbBr2) contains the lead ion (Pb2+) and bromide ions (Br−). According to the solubility rules, most bromides are soluble, except those of lead, silver, and mercury. Therefore, PbBr2 is insoluble in water.
Step 3: Determine the Solubility of Zn(OH)2
Zinc hydroxide (Zn(OH)2) contains the hydroxide ion (OH−). According to the solubility rules, most hydroxides are insoluble, except those of alkali metals and Ba(OH)2. Therefore, Zn(OH)2 is insoluble in water.