( ( ( ( Doubling ( ( the ( initial concentration ) ) ( of ( either reactant ) ) ) ) doubles ) ( ( ( the rate ) , ) ( so ( ( the reaction ) ( is ( ( first order ) ( in ( ( each ( ( ( reactant and ) second ) order ) ) overall ) ) ) ) ) ) ) ) . )
(ROOT (SINV (VP (VBG Doubling) (NP (NP (DT the) (JJ initial) (NN concentration)) (PP (IN of) (NP (DT either) (NN reactant))))) (VP (VBZ doubles)) (NP (NP (DT the) (NN rate)) (, ,) (SBAR (IN so) (S (NP (DT the) (NN reaction)) (VP (VBZ is) (NP (NP (JJ first) (NN order)) (PP (IN in) (NP (NP (DT each) (ADJP (JJ reactant) (CC and) (JJ second)) (NN order)) (ADVP (JJ overall))))))))) (. .)))
Doubling the initial concentration of either reactant doubles the rate, so the reaction is first order in each reactant and second order overall.
(ROOT (S (NP (PRP You)) (VP (VBP see) (NP (DT a) (JJR faster) (NN reaction) (NN rate)) (SBAR (WHADVP (WRB when)) (S (NP (NP (DT the) (NN concentration)) (PP (IN of) (NP (NNS reactants)))) (VP (VBZ is) (ADJP (JJR higher)))))) (. .)))