Question

Classify each of the following electrolytes as strong electrolytes or weak electrolytes:
(i) Sodium hydroxide solution
(ii) Potassiun nitrate solution
(iii) Dilute sulphuric acid
(iv) Acetic acid
(v) Pure sulphuric acid
(vi) Pure water
(vii) Ammonia solution

Answer 1

Step 1: defining strong and weak electrolytes

• Strong electrolytes are a solution or a solute that completely dissociates when get dissolved in a solution.
• Weak electrolytes are a solution or a solute which do not completely dissociate when get dissolved in a solution.

Step 2: classifying the electrolytes as strong or weak electrolytes

1. Sodium hydroxide solution: It gets completely dissociates when get dissolved in a solution, so it is a strong electrolyte.
2. Potassium nitrate solution: It gets completely dissociates when get dissolved in a solution, so it is a strong electrolyte.
3. Dilute sulphuric acid: It gets completely dissociates when get dissolved in a solution, so it is a strong electrolyte.
4. Acetic acid: It is a weak electrolyte as it does not get dissolved in a solution.
5. Pure sulphuric acid: It is a weak electrolyte as it does not get dissolved in a solution.
6. Pure water: It is a weak electrolyte as it does not get dissolved in a solution.
7. Ammonia solution: It is a weak electrolyte as it does not get dissolved in a solution.

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Strong electrolytes are sodium hydroxide solution, potassium nitrate solution, dilute sulphuric acid.

Weak electrolytes are acetic acid, pure sulphuric acid, pure water, ammonia solution.