pH levels are each a 10-fold change so a change by 2 is actually a change by 1000. pH determines certain characteristics in organisms that allow them to live in certain areas so an alteration in pH changes their adaption skills.

Question

why is a change by 2 = 1000?

what would a change by 4 = ?

Answer 1

pH is logarithmic

a change of 2 in pH means a hundred times change in the concentration of H+
... 10^2 = 100

10^4 = 10000

Answer 2

the answer in the book says a change by 2 is 1000?

is a change by 2 = 100 and the book answer is wrong.