Self-Test 12.2A

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Rebecca Doan 2L
Posts: 51
Joined: Thu Jul 27, 2017 3:01 am

Self-Test 12.2A

Postby Rebecca Doan 2L » Thu Dec 07, 2017 1:38 pm

Can someone explain how NO2- is a Lewis base in the reaction HNO2 + HPO4(2-) --> & <-- NO2- + H2PO4-? like how does NO2- have two electrons to donate?

Nisarg Shah 1C
Posts: 54
Joined: Sat Jul 22, 2017 3:00 am

Re: Self-Test 12.2A

Postby Nisarg Shah 1C » Thu Dec 07, 2017 2:42 pm

NO2- is the conjugate base of HNO2 (nitrous acid). It is a Lewis base because the lone pair on the nitrogen atom can be donated to a Lewis Acid. (The Lewis Structure for NO2- is a resonance structure with a single and double bond: O=N-O, and nitrogen has a lone pair)

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