E. coli tolerates a pH range from 2 to 9, which is a ________-fold difference in hydrogen ion concentration.
A) 7
B) 100
C) 1,000
D) 10,000
E) 10,000,000

Question

Quizplus · Accepted Answer

The pH scale is logarithmic, meaning each whole number change represents a tenfold change in hydrogen ion concentration. A pH range from 2 to 9 is a difference of 7 pH units, which corresponds to a 10^7 or 10,000,000-fold difference in hydrogen ion concentration.

E Coli Tolerates a PH Range from 2 to 9