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青州's Question
Chemistry
Posted 4 months ago

what is the net ionic equation for the precipitation reaction that occurs when aqueous solutions of cobalt (II) sulfate and potassium carbonate are combined
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Answer from Sia
Posted 4 months ago
Solution
1
Identify the reactants: The reactants in this precipitation reaction are cobalt (II) sulfate (CoSO4\text{CoSO}_4) and potassium carbonate (K2CO3\text{K}_2\text{CO}_3)
2
Write the balanced molecular equation: The balanced molecular equation for the reaction is: CoSO4(aq)+K2CO3(aq)CoCO3(s)+K2SO4(aq)\text{CoSO}_4 (aq) + \text{K}_2\text{CO}_3 (aq) \rightarrow \text{CoCO}_3 (s) + \text{K}_2\text{SO}_4 (aq)
3
Write the complete ionic equation: The complete ionic equation shows all the ions present in the reaction: Co2+(aq)+SO42(aq)+2K+(aq)+CO32(aq)CoCO3(s)+2K+(aq)+SO42(aq)\text{Co}^{2+} (aq) + \text{SO}_4^{2-} (aq) + 2\text{K}^+ (aq) + \text{CO}_3^{2-} (aq) \rightarrow \text{CoCO}_3 (s) + 2\text{K}^+ (aq) + \text{SO}_4^{2-} (aq)
4
Identify the spectator ions: The spectator ions are K+\text{K}^+ and SO42\text{SO}_4^{2-}, as they do not participate in the formation of the precipitate
5
Write the net ionic equation: The net ionic equation removes the spectator ions and shows only the ions that form the precipitate: Co2+(aq)+CO32(aq)CoCO3(s)\text{Co}^{2+} (aq) + \text{CO}_3^{2-} (aq) \rightarrow \text{CoCO}_3 (s)
Answer
The net ionic equation for the precipitation reaction is: Co2+(aq)+CO32(aq)CoCO3(s)\text{Co}^{2+} (aq) + \text{CO}_3^{2-} (aq) \rightarrow \text{CoCO}_3 (s)
Key Concept
Net ionic equations show only the ions that participate in the formation of the precipitate.
Explanation
In a precipitation reaction, the net ionic equation is derived by removing the spectator ions from the complete ionic equation, leaving only the ions that form the solid precipitate.

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