March 28, 2024, 09:25:07 PM
Forum Rules: Read This Before Posting


Topic: hard-soft SO4 2- and SO3 2-  (Read 1647 times)

0 Members and 1 Guest are viewing this topic.

Offline xshadow

  • Full Member
  • ****
  • Posts: 427
  • Mole Snacks: +1/-0
hard-soft SO4 2- and SO3 2-
« on: September 30, 2020, 08:17:23 AM »
Hi

I don't understand why SO42- is  considered a hard base while So32- is a soft (borderline) one


For monoatomic ionic species like Mg2+ vs K+ (or Ba2+)  is say that Mg2+ is hard because has a much higher  charge/ionic radius of the metal ion than Ba2+ or K+


But for polyatomic ions like SO42- or SO32- how can i say this?
what  parameter I have to consider to say that SO42- is hard while SO32- is a borderline base?

The negative charge is in both case 2-
THe ionic radius ...of the entire ion I think is not so much different...

thanks


Sponsored Links