( ( This experiment ) ( ( will ( ( tell you ) ( whether ( ( a substance ) ( is ( ( ( ( an ( ( acid or ) base ) ) , ) ( but not ) ) ( ( the ( exact value ) ) ( of pH ) ) ) ) ) ) ) ) ; ) )
(ROOT (S (NP (DT This) (NN experiment)) (VP (MD will) (VP (VB tell) (NP (PRP you)) (SBAR (IN whether) (S (NP (DT a) (NN substance)) (VP (VBZ is) (NP (NP (DT an) (NN acid) (CC or) (NN base)) (, ,) (CONJP (CC but) (RB not)) (NP (NP (DT the) (JJ exact) (NN value)) (PP (IN of) (NP (NN pH)))))))))) (: ;)))
This experiment will tell you whether a substance is an acid or base, but not the exact value of pH;
(ROOT (S (SBAR (IN If) (S (NP (DT a) (NN substance)) (VP (VBZ has) (NP (DT a) (NN ph) (NN value)) (NP (QP (JJR greater) (IN than) (CD 7)))))) (, ,) (NP (DT that)) (VP (VBZ indicates) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ is) (NP (NN base)))))) (. .)))
If a substance has a ph value greater than 7,that indicates that it is base.