10 grade science> Potassium permanganate is purple in colou...
Potassium permanganate is purple in colour. On adding KOH, it turns green. What is the compound formed? A. Potassium permanganateB. Potassium manganateC. Both A and B D. None of the above
1 AnswersTo solve the question regarding the color change of potassium permanganate when KOH is added, let's break it down step-by-step.
Chemical Background:
Potassium permanganate (KMnO4) is a strong oxidizing agent and has a deep purple color in solution.
When potassium hydroxide (KOH) is added to potassium permanganate, it can lead to a reaction that changes the oxidation state of manganese.
Reaction Explanation:
In an alkaline medium (like when KOH is added), potassium permanganate can undergo a reduction. The manganese in KMnO4 (which is in the +7 oxidation state) can be reduced to the +6 oxidation state.
The resulting compound from this reaction is potassium manganate (KMnO4 → K2MnO4). Potassium manganate is green in color.
Conclusion:
The green color observed upon the addition of KOH indicates that potassium manganate is formed from potassium permanganate.
Therefore, the answer to the question is B. Potassium manganate.
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