( ( ( The ammonia ) ( -LRB- ( NH3 -RRB- ) ) ) ( ( buffers ( ( the solution ) ( at ( a ( basic pH ) ) ) ) ) ; ) )
(ROOT (S (NP (NP (DT The) (NN ammonia)) (PRN (-LRB- -LRB-) (NP (NNP NH3)) (-RRB- -RRB-))) (VP (VBZ buffers) (NP (NP (DT the) (NN solution)) (PP (IN at) (NP (DT a) (JJ basic) (NN pH))))) (: ;)))
The ammonia (NH3) buffers the solution at a basic pH;
(ROOT (S (PP (IN As) (NP (NN ph) (NNS increases))) (, ,) (NP (DT a) (NN solution)) (VP (VBZ becomes) (ADJP (RBR more) (JJ basic))) (. .)))