Kendra K.

asked • 04/29/21

Chemistry problem

Which is the weakest acid?



H3As


H2Se


HBr

1 Expert Answer

By:

J.R. S. answered • 04/29/21

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You need to have Ka values for the different acids to tell which is the weakest.

HBr is a strong acid, so that's not it.

I looked up the Ka for H3As and for H2Se and found...

H3As ~ 6x10-3

H2Se ~ 1x10-4


So, H2Se would be the weakest.

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Anthony T.

Hi, JRS What would you have predicted based on the periodic table?
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04/29/21

J.R. S.

tutor
I would have predicted H3As would be weaker based on electro negativity. What would you predict?
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04/29/21

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