Can someone help write a net ionic equation?

Question

Could someone assist me in writing a net ionic equation? I need to write a balanced net ionic equation for the reaction between silver nitrate (AgNO3) in aqueous solution and potassium bromide (KBr) in aqueous solution. Here are the relevant reactions to consider:

AgNO3(aq) + KBr(aq) → AgBr(s) + KNO3(aq)
Ag+(aq) + NO3-(aq) + K+(aq) + Br-(aq) → Ag+(aq) + Br-(aq) + KNO3(aq)
Ag+(aq) + Br-(aq) → AgBr(s)
Ag+(aq) + NO3-(aq) + K+(aq) + Br-(aq) → AgBr(s) + K+(aq) + NO3-(aq)

Please help me identify the correct net ionic equation for this reaction. Thank you!

Anonymous · Accepted Answer

You may find it better to do this exercise in full , then you know how to do this yourself in future:

Molecular equation: 
AgNO3(aq) + KBr(aq) → AgBr(s) + KNO3(aq)

Now you write the full ionic equation by showing anything in the molecular equation that can dissociate , as ions . Anything that is (s) , (l) , (g) does not dissociate 
Full ionic equation: 
Ag+(aq) + NO3-(aq) + K+(aq) + Br-(aq) → AgBr(s) + K+(aq) + NO3-(aq)

Now in order to write the net ionic equation you inspect the above full ionic equation and you delete anything that is identical on both sides of the → sign . In this case : K+(aq) and NO3-(aq) These are called spectator ions. What remains is the net ionic equation: 
 Net ionic equation: 
Ag+(aq) + Br-(aq) → AgBr(s).

Anonymous

Can someone help write a net ionic equation?

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