J.R. S. answered 11/12/21
Ph.D. University Professor with 10+ years Tutoring Experience
Look at the complete molecular equation:
CaBr2(aq) + 2AgNO3(aq) ==> Ca(NO3)2(aq) + 2AgBr(s) ... balanced double replacement reaction
Since a precipitate is formed (AgBr), we can write the net ionic equation as follows:
NIE:
2Ag+(aq) + 2Br-(aq) ==> 2AgBr(s)