6D.11 (d)

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Isabel Day 1D
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Joined: Fri Aug 09, 2019 12:15 am

6D.11 (d)

Postby Isabel Day 1D » Sat Dec 07, 2019 10:36 pm

HW question 6D.11 (d) asks whether the solution of KBr has a pH greater than, equal to, or less than 7. Why is the aqueous solution of KBr equal to 7? How would I write a chemical equation to show this?

Posts: 101
Joined: Sat Sep 14, 2019 12:17 am

Re: 6D.11 (d)

Postby Jiyoon_Hwang_2I » Sun Dec 08, 2019 3:32 am

I think it is because Br- is a conjugate base of HBr which is a strong acid therefore Br- is a weak base and weak bases do not affect the pH and K+ is a conjugate acid of strong base KOH so it will also not affect the pH

Eugene Chung 3F
Posts: 142
Joined: Wed Nov 15, 2017 3:03 am

Re: 6D.11 (d)

Postby Eugene Chung 3F » Sun Dec 08, 2019 3:35 am

K+ is in group 1 element which is neutral and we can also know this since the K+ is a conjugate acid of a strong base, KOH
and Br- is conjugate base of strong acid, HBr, so we know that it is also neutral.

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