( ( ( ( ( ( ( The ( standard measure ) ) ( of acidity ) ) ( is pH ) ) , ) and ) ( ( ( a ( pH value ) ) ( of 7 ) ) ( represents ( a ( neutral condition ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (JJ standard) (NN measure)) (PP (IN of) (NP (NN acidity)))) (VP (VBZ is) (ADJP (JJ pH)))) (, ,) (CC and) (S (NP (NP (DT a) (NN pH) (NN value)) (PP (IN of) (NP (CD 7)))) (VP (VBZ represents) (NP (DT a) (JJ neutral) (NN condition)))) (. .)))
The standard measure of acidity is pH, and a pH value of 7 represents a neutral condition.
(ROOT (S (NP (DT The) (NN ph) (NN scale)) (VP (VP (VBZ measures) (NP (NNS acids) (CC and) (NNS bases))) (CC and) (VP (VBZ has) (NP (NP (CD 7)) (PP (IN as) (NP (DT a) (JJ neutral) (NN value)))))) (. .)))
The ph scale measures acids and bases and has 7 as a neutral value.