Question

Enter the net ionic equation, including phases, for the reaction of AgNO3(aq) with K2SO4(aq). Solubility Rules are found here.

Answer 1

Write out the equation: 
AgNO3(aq)+K2SO4(aq) --> Ag2SO4(s)+K2(NO3)... 

Balance the equation: 
2 AgNO3(aq)+K2SO4(aq) --> Ag2SO4(s)+K2(NO3)2... 

Remember to keep molecules intact when you write out the ions.
(2Ag+)+(2NO3-)+(2K+)+(SO42-) --> (Ag2SO42
Cancel out all the spectator ions. These are ions that watch the reaction that didn't change. For this problem 2K+ & 2NO3- are the spectator ions. 

You are left with your net ionic equation of
2Ag+(aq)+SO42-(aq)-->Ag2SO4(s)