vera_ewing
  • vera_ewing
Last one Which of the following statements is true of a solution at pH 7? A. Ka and Kb are equal. B. Kw and Kb are equal. C. Kw, Ka and Kb are equal. D. Kw and Ka are equal.
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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vera_ewing
  • vera_ewing
@sweetburger
sweetburger
  • sweetburger
Tbh I am not really sure about this one I am trying to think through the relation that is being asked about which is Kw=(Ka)(Kb).
sweetburger
  • sweetburger
I dont think it could be B or D.

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vera_ewing
  • vera_ewing
Either A or C? Which one seems the best?
sweetburger
  • sweetburger
Im leaning towards A. Because in C. if Kw, Ka, and Kb were all equal then I dont think the numbers would work out correctly. Not really sure though.
vera_ewing
  • vera_ewing
Yeah it was A! :)
sweetburger
  • sweetburger
:)
Photon336
  • Photon336
I believe it's pH = -Log[H+] pOH = -Log[OH-] pH + pOH = 14 pH = 7 right? So that means pOH must also be 7 So from Kw = Ka x Kb Ka = 10^-7 kW = 10^-14 Kb = 10^-7

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