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Types of Amino Acids

0.02 molar so...

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0.02 molar solution of pyridinium hydrochloride has pH of 3.44 calculate the ionisation
constant of pyridine

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Q. Calculate the pH of

1.0 L

0.10 M

pyridine solution to which

0.3 m o l

of pyridinium chloride

C_{5} H_{5} N H^{+} C l

, has been added, assuming no change in volume.

0.25 M

solution of pyridinium chloride

C_{5} H_{5} {N H}^{+} {C I}^{-}

was found to have a pH of

2.75

K_{b}

C_{5} H_{5} N

0.15

mole of pyridium chloride has been added into

500 {c m}^{3}

0.2 M

pyridine solution. Calculate pH and hydroxyl ion concentration in the resulting solution assuming no change in volume.
(

K_{b}

= 1.5 \times 10^{- 9} M

Q. The percentage of pyridine

(C_{5} H_{5} N)

that forms pyridinium ion

(C_{5} H_{5} N H)

0.10

M aqueous pyridine solution is:

K_{b}

C_{5} H_{5} N = 1.7 \times 10^{- 9}

]

Q. Equilibrium constant for the following reaction is

1 \times 10^{- 9}

:

C_{5} H_{5} N (a q .) + H_{2} O (l) ⇌ C_{5} H_{5} {N H}^{+} (a q .) + {O H}^{-} (a q .)

Determine the mole of pyridinium chloride

(C_{5} H_{5} N . H C I)

that should be added to 500 mL solution of 0.4 M pyridine

(C_{5} H_{5} N)

to obtain a buffer solution of pH = 5:

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Types of Amino Acids

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