I only said that cause someone yay'd for LaTeX compatibility. I was on a long hiatus from PF and was pretty excited to try the app on my new smartphone.
Anyways, looking forward to the new update :wink:
The catch is, you can show Sulphur having double bonds with Oxygens or having a covalent bond with one AND dative bond with other. Both are equally acceptable.
You can consider one of the pi bond in C-O bond to jump to O, thus leaving C with electron deficit, thus making it electrophile.
If you are talking about how it takes part as electrophile in various organic addition reaction, this is the way it works.
We used that series to determine the acidic strength of organic cations/anions/radicals, but I never once used it to test the strength of complexes. For me, these two things were covered in a very different ways.
True that. We can determine the direction of the reaction (Acid to conjugate base in the example) by roughly judging the stability of the products in the test condition.
Try to look the acidity of Ferric ion in terms of Lewis Acid. It is striped of 3 electrons, so it can accept electron.
1) I don't know what to say here, except try to evaluate the acidic strength of the ferric ion in terms of ferric ion alone.
2) Size of ferric ion is quite less than ferrous...
Nah. Just a rough idea. If they are close, then simple fractionating column might not cut it. You can learn more about fractional distillation if you want. But if I were you, I might have went with the option D.
And regarding to the C option, I suppose what you said is applicable more...