SATHEE: Some Basic Concepts Of Chemistry Question 12

Some Basic Concepts Of Chemistry Question 12

Question: 1.0 g of a monobasic acid when completely acted upon Mg gave 1.301 g of anhydrous Mg salt. Equivalent weight of acid is

Options:

A) 35.54

B) 36.54

C) 17.77

D) 18.27

Show Answer

Answer:

Correct Answer: B

Solution:

$\frac{E w, o f, a c i d}{E w, o f, s a l t, o f, M g}$ = $\frac{w e i g h t, o f, a c i d}{W e i g h t, o f, s l t}$ Mg+2HCl (monobasic acid) $\to$ $M g C l_{2}$ + $H_{2}$ Let Ew of acid=Ew of H + Ew of acid radical
$∴$ Ew of salt of Mg = Ew of Mg + Ew of acid radical
$∴$ $\frac{E w, o f, a c i d}{E w, o f, M g, s a l t}$ = $\frac{w e i g h t, o f, a c i d}{W e i g h t, o f, M g, s a l t}$
$\Rightarrow$ $\frac{E w, o f, H + E w, o f, a c i d, r a d i c a l, (E)}{E w, o f, M g, + E w, o f, a c i d, r a d i c a l, (E)}$ = $\frac{1.0}{1.301}$
$\Rightarrow$ $\frac{1 + E}{12 + E} = \frac{1.0}{1.301}$
$∴$ E=35 , 54
$∴$ EW of acid = Ew of H + Ew of acid radical =1+35.54=36.54

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Some Basic Concepts Of Chemistry Question 12

Question: 1.0 g of a monobasic acid when completely acted upon Mg gave 1.301 g of anhydrous Mg salt. Equivalent weight of acid is

Options:

Answer:

Solution:

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