Question

Balance and evaluate the following equation: AgNO3 (aq) + PbBr2 (s) yields AgBr (s) + Pb(NO3)2 (aq)

Answer 1

Try balance with bromide (Br) first then silver (Ag).

Answer 2

AgNO3 (aq) + PbBr2 (s) = AgBr (s) + Pb(NO3)2 (aq)
We start with Br (do not matter which one we start with):
AgNO3 (aq) + PbBr2 (s) = 2 AgBr (s) + Pb(NO3)2 (aq)
We notice that there are 2 Br on both sides but Ag is now wrong:
2 AgNO3 (aq) + PbBr2 (s) = 2 AgBr (s) + Pb(NO3)2 (aq)
Now we can see Ag and Br are correct. But it turns out that Pb, N and O also are balanced, meaning the above equation is balanced.

Answer 3

Thank you very much

Answer 4

No problem.