Redox and Equivalent ConceptMedium
Question
A volume of 50 ml of 0.1 M metal salt reacts completely with 25 ml of 0.1 M sodium sulphite. In the reaction, SO32− is oxidized to SO42−. If the oxidation number of metal in the salt is +3, then what is its new oxidation number?
Options
A.0
B.+1
C.2
D.4
Solution
neq metal salt = neq Na2SO3
Or $\frac{50 \times 0.1}{1000} \times (3 - x) = \frac{25 \times 0.1}{1000} \times 2 \Rightarrow x = 2$
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