Evaluate the Expression Without Using a Calculator

question 5

Multiple Choice

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