PH scale

• pH scale


  Used to measure the acidity or basicity of aqueous solutions
• Acids in aqueous solutions

  Produce H+ ions
• Alkalis in aqueous solutions

  Produce OH+ ions
• Neutral solutions


  pH 7, neither acids nor alkalis
• pH ranges


  • Acid: pH 1-5
  • Neutral: pH 7
  • Alkali: pH 9-14
• Acids


  Can be strong or weak
• Alkalis


  Can be weak or strong