( ( ( ( ( ( Pure water ) ( has ( ( a pH ) ( of 7 ) ) ) ) , ) so ) ( ( ( the point ) ( of ( neutrality ( on ( the ( pH scale ) ) ) ) ) ) ( is 7 ) ) ) . )
(ROOT (S (S (NP (JJ Pure) (NN water)) (VP (VBZ has) (NP (NP (DT a) (NN pH)) (PP (IN of) (NP (CD 7)))))) (, ,) (IN so) (S (NP (NP (DT the) (NN point)) (PP (IN of) (NP (NP (NN neutrality)) (PP (IN on) (NP (DT the) (NN pH) (NN scale)))))) (VP (VBZ is) (NP (CD 7)))) (. .)))
Pure water has a pH of 7, so the point of neutrality on the pH scale is 7.
(ROOT (S (NP (CD 7)) (VP (VBZ is) (NP (NP (DT the) (NN ph)) (PP (IN of) (NP (JJ pure) (NN water))))) (. .)))