untitled.pdf - Reader Below is a proposed reaction mechansim for a composite rea
ID: 974872 • Letter: U
Question
untitled.pdf - Reader Below is a proposed reaction mechansim for a composite reaction. Use this reaction mechanism to answer the next 2 questions Step 1 Step 2 Step 3: CH,Br (g) CH3+ (g)-Br(g) CH3" (g) + H2O (g) CH3OH. (g) CH3OH."(g)-Br (g) CH3OH (g)-HBr (g) (slow) (fast) (fast) 1. Given the composite reaction above, identify ALL the chemicals that would be classified as reaction intermediates 1 CH3 2) H20 3) Br 4) CHjOH2 A) 4 only B) 2 only C) 1 and 3 only D) 1 and 2 only E) 1, 3, and 4 only 2. Given the composite reaction above, what would be the expected rate law were it to determined experimentally? 3. What is the conjugate base of H PO4? A) PO- B) H2PO D) HPO42- E) HPO4 I'm Cortana. Ask me anything 0l 10:50 PM 4/22/2016Explanation / Answer
1. If any species appeared in both reactants and product side then it is an intermediate.
CH3+ appeared as product in step 1 and again appeared as reactant in step 2. Similarly Br- and CH3OH2+
But H2O does not appeared in product side it is only reactant in step 2
2. In any reaction slow step is always RDS (Rate Determining Step) hence step 1 is RDS, so rate depends on concentration of CH3Br only. r = k[CH3Br]
3. If you want conjugate base then remove H+, if you want conjugate acid then add H+ this is the secret
H2PO4- conjugate base is H2PO4- - H+ = HPO4-2
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