# If the ratio of weak base to conjugate acid is #10:1#, to what extent does the #"pH"# change and does it increase or decrease?

##### 1 Answer

Suppose the buffer started with a

#"pH" = "pKa" + log\frac(["A"^(-)])(["HA"])#

Now, if we have

#color(blue)("pH"') = "pKa" + log\frac(10["A"^(-)])(["HA"])#

And if we recall...

#=> "pKa" + log\frac(["A"^(-)])(["HA"]) + log 10#

#= "pH" + log 10#

#= color(blue)("pH" + 1)#

So, the