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At 15 degrees centigrade the percent of dissociation of a weak monobasic acid in its aqua solution with a concentration N/20 is 3.5 % the degree of dissociation of the acid at the temperature is?
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At 15 degrees centigrade the percent of dissociation of a weak monobas...
Degree of Dissociation of a Weak Monobasic Acid at 15°C
Given:
- Temperature: 15°C
- Concentration of aqua solution: N/20
- Percent of dissociation: 3.5%
To Find: Degree of dissociation of the acid at the temperature
Solution:
1. Calculate the dissociation constant (Ka) of the weak monobasic acid using the percent dissociation formula:
% dissociation = (Ka / [acid]) x 100
where [acid] is the initial concentration of the acid
Rearranging the formula:
Ka = (% dissociation x [acid]) / 100
Substituting the given values:
Ka = (3.5 x N/20) / 100
Ka = 0.007N
2. Calculate the degree of dissociation (α) of the acid using the dissociation constant:
Ka = [H+][A-] / [HA]
where [H+], [A-], and [HA] are the concentrations of hydrogen ions, conjugate base, and undissociated acid, respectively
Assuming the initial concentration of the acid to be x:
Ka = (αx)² / (1 - αx)
Substituting the value of Ka:
0.007N = (αx)² / (1 - αx)
Solving for α:
α = 0.07 / (x + 0.007N)
3. Substitute the given concentration N/20 for x and calculate the degree of dissociation:
α = 0.07 / (N/20 + 0.007N)
α = 0.065 or 6.5% (approx.)
Therefore, the degree of dissociation of the weak monobasic acid at 15°C is approximately 6.5%.
Given:
- Temperature: 15°C
- Concentration of aqua solution: N/20
- Percent of dissociation: 3.5%
To Find: Degree of dissociation of the acid at the temperature
Solution:
1. Calculate the dissociation constant (Ka) of the weak monobasic acid using the percent dissociation formula:
% dissociation = (Ka / [acid]) x 100
where [acid] is the initial concentration of the acid
Rearranging the formula:
Ka = (% dissociation x [acid]) / 100
Substituting the given values:
Ka = (3.5 x N/20) / 100
Ka = 0.007N
2. Calculate the degree of dissociation (α) of the acid using the dissociation constant:
Ka = [H+][A-] / [HA]
where [H+], [A-], and [HA] are the concentrations of hydrogen ions, conjugate base, and undissociated acid, respectively
Assuming the initial concentration of the acid to be x:
Ka = (αx)² / (1 - αx)
Substituting the value of Ka:
0.007N = (αx)² / (1 - αx)
Solving for α:
α = 0.07 / (x + 0.007N)
3. Substitute the given concentration N/20 for x and calculate the degree of dissociation:
α = 0.07 / (N/20 + 0.007N)
α = 0.065 or 6.5% (approx.)
Therefore, the degree of dissociation of the weak monobasic acid at 15°C is approximately 6.5%.
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At 15 degrees centigrade the percent of dissociation of a weak monobasic acid in its aqua solution with a concentration N/20 is 3.5 % the degree of dissociation of the acid at the temperature is?
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At 15 degrees centigrade the percent of dissociation of a weak monobasic acid in its aqua solution with a concentration N/20 is 3.5 % the degree of dissociation of the acid at the temperature is? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about At 15 degrees centigrade the percent of dissociation of a weak monobasic acid in its aqua solution with a concentration N/20 is 3.5 % the degree of dissociation of the acid at the temperature is? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for At 15 degrees centigrade the percent of dissociation of a weak monobasic acid in its aqua solution with a concentration N/20 is 3.5 % the degree of dissociation of the acid at the temperature is?.
At 15 degrees centigrade the percent of dissociation of a weak monobasic acid in its aqua solution with a concentration N/20 is 3.5 % the degree of dissociation of the acid at the temperature is? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about At 15 degrees centigrade the percent of dissociation of a weak monobasic acid in its aqua solution with a concentration N/20 is 3.5 % the degree of dissociation of the acid at the temperature is? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for At 15 degrees centigrade the percent of dissociation of a weak monobasic acid in its aqua solution with a concentration N/20 is 3.5 % the degree of dissociation of the acid at the temperature is?.
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