What Is the Meaning of pH = pKa - 1?

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SUMMARY

The discussion centers on the interpretation of the equation pH = pKa - 1, specifically regarding the ratio it implies. Participants debate the meaning of the equation and present two potential answers: (a) 10:1 and (b) 1:10. The consensus leans towards (b) as the correct interpretation of the ratio when pH is one unit lower than pKa. The conversation highlights confusion over the terminology and the clarity of the question posed.

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mimi88
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Homework Statement
a,10:1
b,1:10
Relevant Equations
pH=Pka
I think it is 1:10 but I am not sure the meaning of PKa -1, can someone explain it please.
 
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Nothing you say makes any sense. What are a and b? "The ratio of x = y" is meaningless. The meaning of pKa - 1 is the value of pKa minus one; where's the problem?
 
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Sorry for the mistakes. a) 10:1
b) 1:10
 
That still gives no help to answering the question. Presumably a) and b) are alternative answers to the question, but what was the question? Can you quote it - as exactly as possible please.
 
The question is ' What is the ratio of pH= pKa-1? Two choices are given :

(a)10:1
(b)1:10

so I think the answer is (b)
 
I repeat, the question is meaningless.
 

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