potassium carbonate: K2CO3 → 2 K+ + CO32-
magnesium sulfate: MgSO4 → Mg2+ + SO42-
double displacement reaction
2 K+ + SO42- → K2SO4
Mg2+ + CO32- → MgCO3
Overall reaction: K2CO3 + MgSO4 → K2SO4 + MgCO3
Which ions remain in solution, unreacted, after each of the following pairs of solutions is mixed?
potassium carbonate and magnesium sulfate
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