STEP-BY-STEP EXPLANATION
Firstly, we need to write down the balanced chemical equation
[tex]KF+NH_4NO_3\text{ }\rightarrow KNO_3+NH_4F[/tex]The next step is to write the state of each substance
[tex]KF_{(aq)}+NH_4NO_{3(aq)}\rightarrow KNO_{3(aq)}+NH_4F_{(aq)}[/tex]The next step is to split strong electrolytes into ion
[tex]K^++F^-+NH^+_{4^{}}+NO^-_3\rightarrow K^++NO^-_3+NH^+_4+F^-^{}[/tex]The next step is to cross out the spectator ions on both sides of the complete ionic equation
From the complete ionic equation above, you will see that K^+ appears on both sides,
