问题标题：
【APchemistry的一道题目Step1:N2H2O2N2HO2-+H+(fastequilibrium)Step2:N2HO2-N2O+OH-(slow)Step3:H++OH-H2O(fast)Nitramide,N2H2O2,decomposesslowlyinaqueoussolution.Thisdecompositionisbelievedtooccura】
问题描述：
APchemistry的一道题目
Step1:N2H2O2N2HO2-+H+(fastequilibrium)
Step2:N2HO2-N2O+OH-(slow)
Step3:H++OH-H2O(fast)
Nitramide,N2H2O2,decomposesslowlyinaqueoussolution.Thisdecompositionisbelievedtooccuraccordingtothereactionmechanismabove.Theratelawforthedecompositionofnitramidethatisconsistentwiththismechanismisgivenbywhichofthefollowing?
(A)Rate=k[N2H2O2]
(B)Rate=k[N2H2O2][H+]
(C)Rate=k[N2H2O2]/[H+]
(D)Rate=k[N2H2O2]/[N2HO2-]
(E)Rate=k[N2H2O2][OH-]
Answer:C
请具体讲一讲为什么选C啊?
苗明回答：
Theratelawisdeterminedinthiscasebytheslowestreactionstep:
rate=k[N2HO2-]
Equilibriumforstepbeforethesloweststep:
K=[N2HO2-][H+]/[N2H2O2]
K[N2H2O2]/[H+]=[N2HO2-]
rate=k{K[N2H2O2]/[H+]}
rate=(k1)[N2H2O2]/[H+]
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