Hi Ultima,
Really appreciate all the advice and help you've rendered to us
on this forum!
I have some questions on today's paper:
1. For the question on carbon monoxide and how it inhibits the
transport of blood, will it suffice to just elaborate on the
strength of the ligand, formation of dative bonds and ligand
exchange? Or is further elaboration on "binding irreversibly"
required?
2. For the question on the reagents and conditions (for
nucleophilic addition), Step 1, is it required to indicate 10-20
deg C for HCN and NaCN/KCN trace catalyst, or is room temperature
sufficient? This is because I recalled some reference literature
not specifying temperature conditions.
3. For the question on why a brief exposure to light is
sufficient, will it suffice to elaborate on how the presence of
reactive free radicals due to initial homolytic fission of Cl-Cl
propagates a chain reaction or must we elaborate on the
regeneration of free radicals?
4. For the question pertaining to the reactivity of Br2 with H2
compared to Cl2 and H2 (with reference to Data Booklet bond
energies), will it suffice to discuss about the exothermicity of
the formation of H-Br and H-Cl (based on Bond Energies) only or are
candidates expected to discuss the overall enthalpy changes of the
reactions? I felt that since the latter requires a consideration of
the Bond Energies of Br-Br and Cl-Cl, and since the BE of Br-Br is
less endothermic than that of Cl-Cl, does it really explain why Br2
is less reactive than Cl2 if its bonds are easily broken?
Thank you for your time!