Some Basic Concepts of Chemistry - Result Question 82

####20. For the redox reaction

$$ MnO _4^{-}+C _2 O _4^{2-}+H^{+} \longrightarrow Mn^{2+}+CO _2+H _2 O $$

The correct coefficients of the reactants for the balanced reaction are

$MnO _4^{-}$ $C _2 O _4^{2-}$ $H^{+}$
(a) 2 5 16
(b) 16 5 2
(c) 5 16 2
(d) 2 16 5

(1992)

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Solution:

  1. From the given relative abundance, the average weight of $Fe$ can be calculated as

$$ A=\frac{54 \times 5+56 \times 90+57 \times 5}{100}=55.95 $$



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