( ( ( ( ( Water ( has ( ( a pH ) ( of 7 ) ) ) ) , ) so ) ( this ( is ( ( the point ) ( of ( neutrality ( on ( the ( pH scale ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Water)) (VP (VBZ has) (NP (NP (DT a) (NN pH)) (PP (IN of) (NP (CD 7)))))) (, ,) (IN so) (S (NP (DT this)) (VP (VBZ is) (NP (NP (DT the) (NN point)) (PP (IN of) (NP (NP (NN neutrality)) (PP (IN on) (NP (DT the) (NN pH) (NN scale)))))))) (. .)))
Water has a pH of 7, so this is the point of neutrality on the pH scale.
(ROOT (S (NP (NNP Water)) (VP (VBZ is) (PP (IN at) (NP (NP (DT the) (NN neutrality)) (, ,) (NP (NP (CD 7) (NN point)) (PP (IN on) (NP (DT the) (NN ph) (NN scale))))))) (. .)))