Question

In: Chemistry

When aqueous solutions of potassium carbonate and chromium(II) iodide are combined, solid chromium(II) carbonate and a...

When aqueous solutions of potassium carbonate and chromium(II) iodide are combined, solid chromium(II) carbonate and a solution of potassium iodide are formed. The net ionic equation for this reaction is:

Solutions

Expert Solution

the chemical equation for the reaction is

K2CO3(aq)  + CrI2(aq)    CrCO3(S) + KI(aq)

balance the equation

K2CO3(aq)  + CrI2(aq)    CrCO3(S) + 2KI(aq)

Write the ions seperately

2K+  + CO32-  + Cr2+  + 2I-   CrCO3(S)  +2K+ + 2I-

eliminate ions common to both sides

CO32-  + Cr2+   CrCO3(S)  

this is the net ionic equation and the eliminated ions are called spectator ions


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