( ( ( The concentrations ) ( of ( ( reactants and ) products ) ) ) ( ( ( do not ) ( change ( because ( ( ( the rate ) ( of ( the ( forward reaction ) ) ) ) ( equals ( ( the rate ) ( of ( ( the ( reverse reaction ) ) ( at equlibrium ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS concentrations)) (PP (IN of) (NP (NNS reactants) (CC and) (NNS products)))) (VP (VBP do) (RB not) (VP (VB change) (SBAR (IN because) (S (NP (NP (DT the) (NN rate)) (PP (IN of) (NP (DT the) (JJ forward) (NN reaction)))) (VP (VBZ equals) (NP (NP (DT the) (NN rate)) (PP (IN of) (NP (NP (DT the) (JJ reverse) (NN reaction)) (PP (IN at) (NP (NN equlibrium))))))))))) (. .)))
The concentrations of reactants and products do not change because the rate of the forward reaction equals the rate of the reverse reaction at equlibrium.
(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)))))) (. .)))