Example
Example . These may be consecutive reactions (e.g., oxidation of ethane to CO and H O passes through a series of intermediate steps in which alcohol, aldehyde and acid are formed), reverse reactions and side reactions (e.g., nitration of phenol yields o -nitrophenol and p -nitrophenol). Units of rate constant For a general reaction aA + bB ® cC + dD Rate = k [A] x [B] y Where x + y = n = order of the reaction k = x [A] [B] y ( ) ( ) n concentration × where [A] [B] time concentration Taking SI units of concentration, mol L – and time, s, the units of k for different reaction order are listed in Table . Table . : Units of rate constant Order Units of rate constant Zero order reaction ( ) mol L mol L s s mol L × First order reaction