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posted by  Jimmy1421 on 3/31/2008 1:17:29 PM  |  status: Live  

Easy pH Question - Will Rate Lifesaver!!!

Course Textbook Chapter Problem
General Chemistry N/A N/A N/A
Question Details:
What is the pH of 10M HCl?
 
I know the answer but need to see the work, so please show your work!!!
 
 

 

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posted by mk61 on 3/31/2008 3:19:08 PM  |  status: Live
Asker's Rating: Helpful   
Jimmy1421's comment:
"thanks!"
Response Details:
Because HCl is an acid, it is the same thing as H30+ (the hydronium ion). 

To find the pH of the solution do -log(concentration)
                                                     -log(10M) = -1
                                                           pH = -1
-mk61 please rate me =)
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posted by thatsme on 3/31/2008 4:59:10 PM  |  status: Live
Asker's Rating: Lifesaver   
Jimmy1421's comment:
"thanks!"
Response Details:
since HCl is a strong acid it dissociates completely in solution
HCl---> H3O+ Cl-
so H3O+ has the same concentration as HCl because of this
pH=-log[H3O+]
=-log[10]=-1
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posted by Jimmy1421 on 3/31/2008 5:56:36 PM  |  status: Live
Asker's Rating: N/A-Posted by Person Asking Question   
Response Details:
How can the pH be negative?  I thought the pH scale goes from 0 to 14.

 
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