Which pH corresponds to the equivalence point for the graph below?
14
pH
12
10
8
6
4
2
0
100
0 20 40 60 80
Volume of Base Added (mL)

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

i need mutiple choices

they are all solids.