The other troubles of this kind involved cations or anions, so i was able to recognize the cation together the Lewis acid and also the anion together the Lewis base.

You are watching: Is so2 a lewis acid or base

However, this concern does no involve ions. So i tried come look in ~ the lone pairs on the molecules. Because they both have lone pairs, ns figured because $ceSO2$ has much more lone pairs, it would act as the Lewis base. Also in the final molecule, the hydrogen atoms would certainly be bonded to two different oxygen atoms, therefore I believed of lock as migrating to the lone bag on the $ceSO2$ oxygen atoms.

However, the textbook states that $ceSO2$ is the Lewis acid and also $ceH2O$ is the Lewis base.

Why would this it is in the case? acid-base
boost this question
edited Dec 9 "17 at 19:38

4,3141212 gold badges3636 silver- badges5555 bronze title
asked Dec 9 "17 at 19:06

4111 silver- badge55 bronze badges
include a comment |

2 answers 2

energetic oldest Votes
Molecules the contain polar multiple binding can role as Lewis acid since the main atom is electron deficient v a vacant orbital that can accept an electron pair.

When $ceSO2$ disappear in water , it creates the weak diprotic mountain $ceH2SO3$ (sulfurous acid) from Lewis acid/Lewis basic reaction:

$$ceOond=Sond=O + H2O H2SO3$$


The $ceO$ atom that $ceH2O$ molecule donates a lone pair come the $ceS$ of $ceSO2$,forming a new $ceSond-O$ $sigma$-bond and breaking $ceSond=O$ $pi$-bond.

enhance this price
edited Dec 16 "19 at 20:55

Mathew Mahindaratne
33.7k1717 yellow badges4545 silver badges9595 bronze badges
reply Jul 27 "18 in ~ 3:24

Adnan AL-AmlehAdnan AL-Amleh
95611 yellow badge1212 silver- badges2020 bronze title
include a comment |
The oxygen in $ceH2O$ currently has the orbitals ($2s^2$,$2p^4$) filled and since oxygen is in the 2nd row of the regular table it can"t kind hypervalent molecule (That means that the oxygen would have an ext than 8 valence electrons).Sulfur meanwhile is in the third row of the regular table and also can therefore type such molecules.

Because the this it is clear, that the $ceH2O$ can"t act together a Lewis mountain as it can"t have actually any much more electrons. Because of this it has to be the Lewis-base which leaves $ceSO2$ as the Lewis-acid.

boost this answer
answer Dec 10 "17 at 9:20

58722 silver badges77 bronze title
add a comment |

your Answer

Thanks because that contributing response to stack Exchange!

Please be certain to answer the question. Carry out details and also share your research!

But avoid

Asking for help, clarification, or responding to other answers.Making statements based upon opinion; ago them up with recommendations or an individual experience.

Use MathJax to layout equations. MathJax reference.

To discover more, watch our tips on writing great answers.

See more: Phyllis Loves Classic Movies: " Are You A Good Witch Or A Bad Witch

Draft saved
Draft discarded

Sign up or log in in

sign up using Google
sign up making use of Facebook
authorize up utilizing Email and also Password

Post together a guest

email Required, but never shown

Post as a guest


Required, yet never shown

post Your prize Discard

By click “Post her Answer”, you agree come our regards to service, privacy policy and cookie plan

Not the answer you're feather for? Browse various other questions tagged acid-base or asking your own question.

Featured ~ above Meta
Examples the Lewis base nature that sulfur dioxide
how does a Lewis acid differ indigenous an oxidizing agent; Lewis bases native reducing agents?
Why is carbon dioxide thought about a Lewis acid?
Why is carbon monoxide a "weak" lewis base?
just how to identify lewis acids and also bases
team 15... Lewis Acid, Lewis basic or not At All?
instances of Lewis basic nature the sulfur dioxide
warm Network questions an ext hot concerns

concern feed
subscribe to RSS
concern feed To subscribe to this RSS feed, copy and paste this URL into your RSS reader.
stack Exchange Network
site design / logo © 2021 stack Exchange Inc; user contributions license is granted under cc by-sa. Rev2021.10.20.40511 stack Exchange works best with JavaScript enabled

your privacy

By clicking “Accept every cookies”, you agree stack Exchange deserve to store cookies on your an equipment and disclose info in accordance v our Cookie Policy.