A solution containing 2.68×10−3mol of An+ ions requires 1.608×10−3mol of MnO−4 for the complete oxidation of An+ to AO−3 in acidic medium. What is the value of n ?
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Solution
MnO−4 would convert to Mn2+ ∴ Its n-factor would be 5 ∴ Equivalents ofMnO−4=1.608×10−3×5=8.04×10−3 Equivalents ofAn+=8.04×10−3 n-factorofAn+=5−n ∴(5−n)×2.68×10−3=8.04×10−3 ⇒n=2