Chemistry unit 2

A dissolved reagent X reacts with Y to form P. Initial rates in arbitrary units are measured before appreciable depletion and rounded to the nearest whole rate unit. Run 1: [X]=1, [Y]=1, rate=2. Run 2: [X]=2, [Y]=1, rate=4. Run 3: [X]=1, [Y]=2, rate=2. At much lower Y concentrations, rate becomes proportional to [Y]. A proposed model is v = k[X][Y]/(K+[Y]). A competing elementary model is v = c[X][Y]. Temperature and solvent are constant.