How do you calculate the pH of HCl? Explain with example.

pH is “potential of hydrogen.” It is a unit of measurement which represents the concentration of hydrogen ions in a solution. This unit was introduced by biochemist Soren Peter Lauritz Sorensen in 1909.

  • If pH scale is Acidic – Less than 7
  • Neutral – 7
  • Basic – Greater than 7

pH can be determined by a pH indicator such as pH paper. pH paper usually contains weak acid or a weak base which will respond by changing colour at a specific pH. pH is determined by the concentration of H+. HCl solutions are strong acids, so we can already expect a pH less than 7.

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