, at sübstance is present? GIVE IT SOME THOUGHT a. What is the oxidation state o
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, at sübstance is present? GIVE IT SOME THOUGHT a. What is the oxidation state of manganese in KMnO4? b. Based on this oxidation state, why is KMnO4 an excellent oxidizing agent? Potassium permanganate, KMnO4, is an excellent oxidizing agent in acidic media. T Mn2, which has a very faint pink color. Place 1 mL of 0.1 M sodium oxalate, Na2C204, in a clean test tube. Add 10 drops of 6 M sulfuric acid. Mix thoroughly. To the resulting solution add 1 or 2 drops of 0.1 M KMnO4 and stir. If there is no obvious indication that a reaction has occurred, warm he test tube gently in a hot water bath (see Appendix J). he permanganate ion is purple and is reduced to the manganous ion, opyright © 2015 Pearson Education, Inc.Explanation / Answer
Ans. (a) Determination of oxidation state of KMnO4
Let Mn = x
+1 + x + 4(-2) = 0
x - 7 = 0
x = + 7
Mn = +7
Ans (b) KMnO4 acts as a strong oxidizing agent because KMnO4 contains Mn which is present in its highest oxidation state that means it has strong tendency to oxidize other species so that it can reduce its oxidation state to become stable.
Reaction involved due to KMnO4
MnO4 - + 8H+ + 5 e = Mn 2+(aq) + 4H2O
+7 +2
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