Determining if a salt is basic or acidic?

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JulieAljamal1E
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Joined: Fri Sep 28, 2018 12:24 am

Determining if a salt is basic or acidic?

Postby JulieAljamal1E » Mon Dec 03, 2018 4:49 pm

In problem 6D.11 7th edition, it asks to decide whether an aqueous solution off each of the following salts has a pH equal to, less than 7, or greater than 7. If pH>7 or pH<7 then write a chemical equation to justify the answer. a) NH4Br b) Na2CO3 c) KF d) KBr e)AlCl3 f)Cu(NOs)2.Can someone please explain how to determine if the ph is less greater or equal to 7 and the justification equation?

Iris Bai 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

Re: Determining if a salt is basic or acidic?

Postby Iris Bai 2K » Tue Dec 04, 2018 2:08 pm

I'm not sure about the justification equation, but to determine whether a compound is acidic or basic, you look at the conjugate acid/base in each salt. For example, in NH4Br is made of NH4+ and Br-. The conjugate base would be NH3 (weak base), and the conjugate acid would be HBr (strong acid). Therefore, the overall pH of the molecule is acidic, or 7.


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