( ( Pure water ) ( ( ( ( ( is neutral ) , ) and ) ( so ( ( registers 7 ) ( on ( the ( pH scale ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Pure) (NN water)) (VP (VP (VBZ is) (ADJP (JJ neutral))) (, ,) (CC and) (VP (ADVP (RB so)) (VBZ registers) (NP (CD 7)) (PP (IN on) (NP (DT the) (NN pH) (NN scale))))) (. .)))
Pure water is neutral, and so registers 7 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))))))) (. .)))