( ( ( The degree ) ( of ( ( acidity or ) basicity ) ) ) ( ( can ( be ( measured ( by ( using ( the ( pH scale ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN degree)) (PP (IN of) (NP (NN acidity) (CC or) (NN basicity)))) (VP (MD can) (VP (VB be) (VP (VBN measured) (PP (IN by) (S (VP (VBG using) (NP (DT the) (NN pH) (NN scale)))))))) (. .)))
The degree of acidity or basicity can be measured by using the pH scale.
(ROOT (S (NP (DT The) (NN ph) (NN scale)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (ADVP (RB succinctly)) (VB communicate) (NP (NP (DT the) (NN acidity) (CC or) (NN basicity)) (PP (IN of) (NP (DT a) (NN solution))))))))) (. .)))