Redox and Equivalent ConceptHard
Question
A quantity of 1.0 g of an acid when completely acted upon by magnesium gave 1.301 g of the anhydrous magnesium salt. The equivalent weight of the acid is
Options
A.35.54
B.36.54
C.48
D.49
Solution
Let the acid be HnA.
neq acid = neq magnesium salt
$\text{Or }\frac{1.0}{1 + E_{A^{n -}}} = \frac{1.301}{12 + E_{A^{n -}}} \Rightarrow E_{A^{n -}} = 35.54$
∴ Equivalent weight of acid = 1 + 35.54 = 36.54.
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