MCQ
van't-Hoff factor $(i)$ for this reaction is
- A$2$
- B$3$
- ✓$4$
- D$5$
✓
Answer
Correct option: C.
$4$
c
$(c)$ This is borne out by the fact that solutions of nitric acid in pure sulphuric acid show an almost four-fold molecular freezing-point depression (actual ly $i \approx 3.82$), which has been interpreted as being due to formation of the four ions
$(c)$ This is borne out by the fact that solutions of nitric acid in pure sulphuric acid show an almost four-fold molecular freezing-point depression (actual ly $i \approx 3.82$), which has been interpreted as being due to formation of the four ions
$(1)$ $H\ddot O\, - \,N{O_2}\,\overset {{H_2}S{O_4}} \longleftrightarrow {H_2}\mathop O\limits_ \oplus - N{O_2}$ $\overset {{H_2}S{O_4}} \longleftrightarrow {H_2}O{ - ^ \oplus }N{O_2}$
$(2)$ ${H_2}O\, + \,{H_2}S{O_4}\, \rightleftharpoons \,{H_3}{O^ \oplus }\, + \,HSO_4^\Theta $
net reaction, i.e., $HN{O_3}\, + \,2{H_2}S{O_4}\, \rightleftharpoons $ $^ \oplus N{O_2}\, + {H_3}{O^ \oplus } + \,2HSO_4^\Theta $
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