Redox Reactions And Electrochemistry Ques 7
Question: What is the equivalent mass of $ IO_4^{-} $ when it is converted into $ I_2 $ in acid medium [Kerala PMT 2004]
Options:
A) M/6
B) M/7
C) M/5
D) M/4
E) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
Equivalent mass $ =\frac{\text{Molecular weight}}{\text{Change in oxidation number per mole}} $ Suppose molecular weight is $ M $ Oxidation number of $ I_2 $ in $ IO_4^{-} $ in Acidic medium i.e., $ I\times (-8)+1{{e}^{-}}=+7 $ So eq. wt. $ =M/7 $ .
