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Question

Differentiate between.

(a) Strong electrolytes and weak electrolytes


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Solution

The differences between strong electrolytes and weak electrolytes are as follows

Strong Electrolytes Weak Electrolytes
  • Those electrolytes which in the molten or dissolved state dissociate into ions completely and allow a large quantity of electricity to pass through them are called strong electrolytes.
  • Those electrolytes which in the molten or dissolved state dissociate to a minimal extent only and allow a very small amount of electricity to pass through them are called weak electrolytes.
  • Examples are: Aqueous Hydrochloric acid HCl, Sodium chloride NaCl, Potassium chloride KCl, etc.
  • Dissociation of Sodium chloride is shown as:

NaCl(aq)Na+(aq)+Cl-(aq)

  • Examples are: Acetic acid CH3COOH, Ammonium hydroxide NH4OH, etc.
  • Dissociation of Acetic acid can be shown as:

CH3COOH(aq)CH3COO-(aq)+H+(aq)

  • All strong acids, bases, and salts of strong acids are strong electrolytes.
  • All weak acids, bases, and salts of weak acids are weak electrolytes.

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