Question

The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. What is the approximate pH of a solution whose hydrogen ion concentration is 2*10^-9
A. 1.0
B. 2.9
C. 8.7
D. 9.3

Answer 1

Answer:

ANSWWER IS C.8.7

Step-by-step explanation:

I JUST TOOK THE TEST

Answer 2

PH = -log[H+]
= -log(2*10^-9)
= -(log(2) +log(10^-9))
= -(0.3 -9)
= 8.7

The appropriate choice is
  C. 8.7