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