6D.11 part d

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Ellis Song 4I
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Joined: Thu Jul 11, 2019 12:17 am

6D.11 part d

Postby Ellis Song 4I » Fri Dec 06, 2019 4:18 pm

Why is the pH of KBr neutral but the pH of KF in part c is basic?

Sanjana Munagala_1j
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Re: 6D.11 part d

Postby Sanjana Munagala_1j » Fri Dec 06, 2019 11:49 pm

F- is that conjugate base of a weak acid and thus it will result in the whole solution being basic. This is the reaction:
F- + H20 = HF + OH-
please note the equal sign is representative of the two arrows
Since this reaction makes more hydroxide ions, it increases the pOH and thus decreases the pH.

Hope that helps!


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