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what will be the formula for dissociation constant for strong electrolyte and weak electrolyte?
Answers
Strong Electrolytes and Weak Electrolytes Tutorial
An electrolyte is a substance which conducts electricity when in solution.
A nonelectrolyte is a substance which does not conduct electricty when in solution.
A strong electrolyte is a good conductor of electricity.
A weak electrolyte is a poor conductor of electricity.
The strength of an electrolyte, whether it is a strong electrolyte or a weak electrolyte, depends on the substance's ability to form ions by dissociation (or ionization).
A strong electrolyte has a high degree of dissociation (ionisation) in solution:
For a strong electrolyte which is made up of a salt with the formula MX dissolving in water:
MX(aq) ⇋ M+(aq) + X-(aq)
the equilibrium position lies very far to the right, there are many ions in solution
the value of the equilibrium constant, K, for the dissociation is large
If the substance completely dissociates in the solvent, that is, if the degree of dissociation is 100%, we may write this as a reaction which occurs in only one direction:
MX → M+(aq) + X-(aq)
A weak electrolyte has a low degree of dissociation (ionisation) in solution:
For a weak electrolyte made up of a compound with the formula ZX dissolving in water:
ZX(aq) ⇋ Z+(aq) + X-(aq)
the equilibrium position lies very far to the left, there are very few ions in solution
the value of the equilibrium constant, K, for the dissociation is small.