Concentration of OH in HCl

  • #1

Homework Statement


At 10 C, the concentration of OH in 1 M of HCl is approximately:

Answer: 3x10^15

Homework Equations


Kw=KaKb

The Attempt at a Solution


This answer throws me off. If we assume that HCl completely dissociates, we use the [H+] from the acid in the above equation:
1x10^-14 = 1 [OH]

I get 1 x 10^-14, not 3 x 10^-15. What am I missing here? Is my book wrong? Thanks.
 

Answers and Replies

  • #3
Thanks for the table but I still don't think I get it. Since this is for the mcat, how am I supposed to calculate the OH concentration at 10 C?
 
  • #4
Borek
Mentor
28,628
3,102
What is the definition of Kw?
 
  • #5
Kw is the equilibrium constant for [H+] and [OH-]. In aqueous solution, Kw remains at 10^-14.
 
  • #6
Borek
Mentor
28,628
3,102
In aqueous solution, Kw remains at 10^-14.
Have you really seen the table? What is the Kw value at 10°C?
 

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