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Home Q & A Board Science-Related Homework Help High School Level Science
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Transgenic Rat Transgenic Rat
wrote...
Posts: 15
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7 years ago
I don't understand this part of equation

[H+][A-]
-----------
HA

Why are you multiplying H x A on top? Wouldn't you add H and A on top to find the proper concentration of these products?

Let's say h+ and A- are equal to .5 If you multiply .5 x .5 you get .25 which makes no sense since I now have less products even though I multiplied them?

Can someone help my logic please.
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wrote...
#1
7 years ago
Hello,

The Henderson-Hasselbalch equation is: (1) a rearrangement of the Ka expression followed by (2) the use of negative logarithms.
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Transgenic R. Author
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#2
7 years ago Edited: 7 years ago, Transgenic Rat
Ok, I'm not looking to SOLVE a problem. That picture you uploaded is just simple algebra of cancelling things out on each side of an equation without any explanation whatsoever.

 I want to understand why does Ka = H+ x A instead of adding H and A? I know H and A are the disassociated acid/base
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