( ( pH ( In chemistry ) ) ( , ( pH ( ( is ( ( a measure ) ( of ( ( the concentration ) ( of ( ( hydrogen ions ) ( in ( ( solution , ) ( which ( is ( ( a measure ) ( of ( ( acidity or ) alkalinity ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (ADVP (RB pH)) (IN In) (NP (NN chemistry))) (, ,) (NP (NN pH)) (VP (VBZ is) (NP (NP (DT a) (NN measure)) (PP (IN of) (NP (NP (DT the) (NN concentration)) (PP (IN of) (NP (NP (NN hydrogen) (NNS ions)) (PP (IN in) (NP (NP (NN solution)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (NP (NP (DT a) (NN measure)) (PP (IN of) (NP (NN acidity) (CC or) (NN alkalinity))))))))))))))) (. .)))
pH In chemistry, pH is a measure of the concentration of hydrogen ions in solution, which is a measure of 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)))) (. .)))