( ( ( The ( hydrogen ( ion concentration ) ) ) ( of ( a ( water ( to ( denote ( ( Acidity or ) Alkalinity ) ) ) ) ) ) ) . )
(ROOT (NP (NP (DT The) (NN hydrogen) (NN ion) (NN concentration)) (PP (IN of) (NP (DT a) (NN water) (S (VP (TO to) (VP (VB denote) (NP (NNP Acidity) (CC or) (NNP Alkalinity))))))) (. .)))
The hydrogen ion concentration of a water to denote Acidity or Alkalinity.
(ROOT (S (NP (NP (DT The) (NN concentration)) (PP (IN of) (NP (NP (NN hydrogen) (NNS ions)) (PP (IN in) (NP (DT a) (NN solution)))))) (VP (VBZ is) (VP (VBN called) (ADVP (RB acidity)))) (. .)))