What Is the Meaning of pH = pKa - 1?

[mimi88]

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.

 

[mjc123]

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?

 

[mimi88]

Sorry for the mistakes. a) 10:1
b) 1:10

 

[mjc123]

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.

 

[mimi88]

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)

 

[mjc123]

I repeat, the question is meaningless.