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Nucleophilic Addition at the Carbonyl

36. in which ...

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36. in which case pH will not change on dilution upto 100 times (1)0.01 M ch3coona + 0.01 Mch3cooh (2)0.01 M CH3COONH4 (3)0.01M NH4CN (4)all of the above

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Q. Find the change in pH when 0.01 mole

C H_{3} C O O N a

is added to one litre of 0.01 M

C H_{3} C O O H

p K_{a} = 4.74

100

0.01

C H_{3} C O O H

200

0.02

C H_{3} C O O N a

are mixed to form a buffer solution.

700

mL of water is added to this solution. The pH before and after dilution are:
(pKa = 4.74, log 4 =0.6)

Q. A buffer solution is formed by mixing 100 mL 0.01 M

C H_{3} C O O H

with 200 mL 0.02 M

C H_{3} C O O N a

. If this buffer solution is made to 1 lit by adding 700 mL of water,

p H

will change by a factor of:

p K_{a}

C H_{3} C O O H

is 4.74. The pH of 0.01 M

C H_{3} C O O N a

p K_{a}

of acetic acid is 4.741. The concentration of

C H_{3} C O O N a

is 0.01 M. The pH of

C H_{3} C O O N a

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Nucleophilic Addition at the Carbonyl

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