When 0.1 mole of \( \mathrm{CH}_{3} \mathrm{NH}_{2} \) (ionization constant, \( \mathrm{K}_{\mat....

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When 0.1 mole of \( \mathrm{CH}_{3} \mathrm{NH}_{2} \) (ionization constant,
\( \mathrm{P} \)
\( \mathrm{K}_{\mathrm{b}}=5 \times 10^{-4} \) ) is mixed with 0.08 mole \( \mathrm{HCl} \) and the volume is made up to 1 litre, find the \( \left[\mathrm{H}^{+}\right] \)of resulting solution:
(1) \( 8 \times 10^{-2} \)
(2) \( 2 \times 10^{-11} \)
(3) \( 1.23 \times 10^{-4} \)
(4) \( 8 \times 10^{-11} \)


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