( ( ( the pH ) ( of ( pure water ) ) ) ( ( is ( close ( to ( 7 ( at ( ambient temperatures ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT the) (NN pH)) (PP (IN of) (NP (JJ pure) (NN water)))) (VP (VBZ is) (ADJP (JJ close) (PP (TO to) (NP (NP (CD 7)) (PP (IN at) (NP (JJ ambient) (NNS temperatures))))))) (. .)))
the pH of pure water is close to 7 at ambient temperatures.
(ROOT (S (NP (CD 7)) (VP (VBZ is) (NP (NP (DT the) (NN ph)) (PP (IN of) (NP (JJ pure) (NN water))))) (. .)))