Multiple choice general knowledge science & technology

What does pH measure of the concentration of

  1. Hydrogen Ions

  2. NaOH

  3. HCL

  4. Oxygen
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A Correct answer
Explanation

pH measures the concentration of hydrogen ions (H+) in a solution on a logarithmic scale from 0-14. It indicates acidity or alkalinity - lower pH means higher H+ concentration (more acidic), higher pH means lower H+ concentration (more basic).

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