Electrochemistry

Question

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)

Assertion (A) : An aqueous solution of … when used for volumetric analysis, its concentration should be checked before the use.

Reason (R) : On aging, … solution absorbs atmospheric ….

In the light of the above statements, choose the correct answer from the options given below :

Accepted Answer

Option D. In volumetric analysis, the concentration of a solution is a crucial factor in determining the accuracy of the results. In the case of an aqueous solution of KOH, the concentration can change over time due to the absorption of atmospheric CO₂. This occurs because KOH is a basic (alkaline) solution and reacts with carbon dioxide (CO₂) from the air to form potassium carbonate (K₂CO₃).

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Electrochemistry

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