Evaluate the expression without using a calculator.
-The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by pH = -log x where x represents the concentration of the hydrogen ions in the
Solution in moles per liter. Find the pH if the hydrogen ion concentration is 5 × 10-12.
A) 11.7
B) 11.3
C) 12.7
D) 12.3

Question

Quizplus · Accepted Answer

The pH is calculated as -log(5 × 10^-12). Approximating log(5) as 0.7, the pH is about 12 - 0.7 = 11.3.

Evaluate the Expression Without Using a Calculator