Page 1 of 1

6.5 - how to identify which is the lewis acid and base?

Posted: Sun Dec 01, 2019 5:41 pm
by Julia Mazzucato 4D
6.5
Hydrogen peroxide, H2O2, reacts with sulfur trioxide to form peroxomonosulfuric acid, H2SO5, in a Lewis acid–base reaction.
(a) Write the chemical equation for the reaction.
(b) Draw the Lewis structures of the reactants and product (in the product, one OOH group in sulfuric acid is replaced by an OOOH group).
(c) Identify the Lewis acid and Lewis base.

I am not sure how to identify which is the acid and which is the base. Is there are clue in the Lewis structures?

Re: 6.5 - how to identify which is the lewis acid and base?

Posted: Sun Dec 01, 2019 5:44 pm
by Sjeffrey_1C
If you draw the Lewis structures, look at which have lone pairs. This will give you an indication of which will donate electrons (lewis base) and which will accept electrons (lewis acid)!

Re: 6.5 - how to identify which is the lewis acid and base?

Posted: Sun Dec 01, 2019 5:46 pm
by Julia Mazzucato 4D
Sjeffrey_1H wrote:If you draw the Lewis structures, look at which have lone pairs. This will give you an indication of which will donate electrons (lewis base) and which will accept electrons (lewis acid)!


For H2O2 and SO3, both have lone pairs on them. Would SO3 be the lewis acid because of its resonance structures?