MCQ
A monoprotic acid in a $0.1\,\,M$ solution ionizes to $0.001\%$. Its ionisation constant is
- A$1.0 \times {10^{ - 3}}$
- B$1.0 \times {10^{ - 6}}$
- C$1.0 \times {10^{ - 8}}$
- ✓$1.0 \times {10^{ - 11}}$
$HA$ $ \rightleftharpoons $ ${H^ + } + {A^ - }$
Ionisation constant = ?
$\alpha = 0.001\,\% = \frac{{0.001}}{{100}} = {10^{ - 5}}$
$K = \frac{{{\alpha ^2}}}{V} = \frac{{{{[{{10}^{ - 5}}]}^2}}}{{10}} = {10^{ - 11}}$.
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$R - X \rightarrow R ^{\oplus} X ^{\ominus} \rightarrow R ^{\oplus} \| X ^{\ominus} \stackrel{ Y^\ominus }{\rightarrow} R - Y + X ^{\ominus}$
Ion pair Solvent separated ion pair
A student writes general characteristics based on the given mechanism as:
$(a)$ The reaction is favoured by weak nucleophiles
$(b)$ $R^ \oplus$ would be easily formed if the substituents are bulky
$(c)$ The reaction is accompained by recemization
$(d)$ The reaction is favoured by non-polar solvents.
Which observations are correct $?$