Electrolytes and its Types


 
 
Concept Explanation
 

Electrolytes and its Types

Electrolytes:

A compound that conduct electricity in molten (fused) or aqueous (solution) state and which simultaneously undergoes decomposition (breaking into ions), with the passage of an electric current through it, is an electrolyte. We classify electrolytes as strong electrolytes and weak electrolytes. This is done on the basis of the extent to which the electrolyte breaks into ions.

1.  Strong Electrolytes:

These are the electrolytes that ionize completely to form free mobile ions in the solution. A large number of free mobile ions are available, in them, to conduct electricity. For eg. Nh_4Cl,: KOH,:HCl.

2.  Week Electrolytes:

These are the electrolytes that ionize only partially to form free mobile ions. Only a small number of free mobile ions are available, in them, to conduct electricity. For eg. HF;, AgCl etc.

Some more  examples of strong and weak electrolytes:

Strong Electrolyte Weak Electrolyte

Sea water

Nitric acid

Copper sulphate solution

Sodium chloride

Sulphuric acid

Ordinary tap water

Oxalic acid

Carbonic acid

Ammonium hydroxide

Citric acid

 

Sample Questions
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Question : 1

Read thge given statements and select the correct option.

Statement 1 : The conductivity of an electrolyte is very low as compared to a metal at room temperature.

Statement 2 : The density of free ions in electrolyte is much smaller than density of free electrons in metals.

Right Option : A
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Question : 2

Electrolyte used in voltaic cell is :

Right Option : A
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Question : 3

Assetion : In an electrolyte, the positive ions move from left to right and the negative ions from right to left, so there is no net current flows in an electrolyte.

Reason : The current flowers from cathode to anode in an electrolyte.

Right Option : D
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