Question

The hydrogen ion concentration is 1 × 10-7. What is the ph of this solution?

Answer 1

Answer:

• The pH of the solution is 7

Explanation:

The pH is a measure of the acidity of the solutions. It is defined as the negative logarithm of the molar concentration of hydrogen ions (H⁺).

• pH = - log [H⁺]

The hydrogen ion concentration of this solution is 1 × 10⁻⁷ M.

Hence:

• pH = - log (1 × 10⁻⁷) = - (-7) = 7

This pH corresponds to a neutral solution (neither acid nor alkaline).

You should remember this relation bwtween pH and acidity/alkaliinity:

• Low pH (0.0 or close) corresponds to strong acids
• HIgh pH (14.0 or close) corresponds to strong bases
• Acids have pH between 0.0 and 7.0
• Bases have pH between 7.0 and 14.0