Why is SO2 a Lewis acid?

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Melody Haratian 2J
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Why is SO2 a Lewis acid?

Postby Melody Haratian 2J » Thu Nov 19, 2020 7:40 pm

Hi guys!
I’m having a lot of trouble understanding why SO2 is a Lewis acid. Sapling says that it’s a molecule with a polar double bond but how does that help it accept more electrons?
Thanks!

Kailani_Dial_2K
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Re: Why is SO2 a Lewis acid?

Postby Kailani_Dial_2K » Thu Nov 19, 2020 8:53 pm

When you do the Lewis structure for SO2 and calculate formal charge there is a +2 since it is a positive charge, that means it is electron deficient. Since it is electron deficient it can accept an electron pair making it a lewis acid

Sahaj Patel Lec3DisK
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Re: Why is SO2 a Lewis acid?

Postby Sahaj Patel Lec3DisK » Thu Nov 19, 2020 9:12 pm

Exactly what Kailani said! SO2 is an ion with a +2 charge, therefore since it can accept electrons it will be classified as a Lewis Acid. Alternatively, Lewis bases can donate electrons.


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