Assumption for Subtracting X in Ka or Kb calculation  [ENDORSED]

Acidity
Basicity
The Conjugate Seesaw

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Alexia Joseph 2B
Posts: 56
Joined: Thu Jul 27, 2017 3:01 am

Assumption for Subtracting X in Ka or Kb calculation

Postby Alexia Joseph 2B » Sat Dec 09, 2017 6:12 pm

For ICE charts we make, what is the reasoning for why we assume there is little change (so little that it is negligible) if Ka is small?

Reyna Alonso 1E
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Re: Assumption for Subtracting X in Ka or Kb calculation

Postby Reyna Alonso 1E » Sat Dec 09, 2017 7:32 pm

since the x value will be so small then it will most likely not change the concentration of the reactants such as Professor Lavelle mentioned in class where if you have 1 million dollars and take away a dollar you still pretty much have 1 million dollars.

Thompson W 2C
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Re: Assumption for Subtracting X in Ka or Kb calculation

Postby Thompson W 2C » Sun Dec 10, 2017 1:09 am

Make sure to not assume that x=0 though!

Ashley Fallon 3C
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Re: Assumption for Subtracting X in Ka or Kb calculation  [ENDORSED]

Postby Ashley Fallon 3C » Sun Dec 10, 2017 10:20 pm

the x value is so small compared to the concentration that the change is negligible for when you're calculating x


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