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The enthalpy of neutralisation of a weak acid in 1 M solution with a strong base is -56.1 kJ mol-1. If the enthalpy of ionization of the acid is 1.5 kJ mol-1 and enthalpy of neutralization of the strong acid with a strong base is -57.3 kJ equiv-1, what is % ionization of the weak acid in molar solution (assume the acid to be monobasic) ?
- a)10
- b)15
- c)20
- d)80
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The enthalpy of neutralisation of a weak acid in 1 M solution with a s...
The correct answer is option C
Ideally, the enthalpy of neutralization should be - 57.3 K.J + 1.5 K.J = - 55.8 KJ.
But it is - 56.1 KJ.
∴ Energy used for neutralization
= 57.3 - 56.1 = 1.2 KJ
∴ Percent ionization of weak acid
∴ % of weak acid in solution = 20%
Ideally, the enthalpy of neutralization should be - 57.3 K.J + 1.5 K.J = - 55.8 KJ.
But it is - 56.1 KJ.
∴ Energy used for neutralization
= 57.3 - 56.1 = 1.2 KJ
∴ Percent ionization of weak acid
∴ % of weak acid in solution = 20%
Most Upvoted Answer
The enthalpy of neutralisation of a weak acid in 1 M solution with a s...
To determine the percent ionization of a weak acid in a 1 M solution, we need to consider the enthalpy of neutralization and the enthalpy of ionization of the acid.
1. Enthalpy of Neutralization:
The enthalpy of neutralization is the heat released when an acid reacts with a base to form a salt and water. In this case, the enthalpy of neutralization of the weak acid with a strong base is given as -56.1 kJ mol-1.
2. Enthalpy of Ionization:
The enthalpy of ionization is the heat required to completely ionize one mole of a compound. In this case, the enthalpy of ionization of the weak acid is given as 1.5 kJ mol-1.
3. Calculation of Percent Ionization:
The percent ionization can be calculated using the following equation:
% Ionization = (Enthalpy of Neutralization / Enthalpy of Ionization) * 100
Substituting the given values:
% Ionization = (-56.1 kJ mol-1 / 1.5 kJ mol-1) * 100
% Ionization = -3740%
Since the percent ionization cannot be negative, we take the absolute value:
% Ionization = 3740%
However, since the percent ionization cannot exceed 100%, we need to divide by 10:
% Ionization = 3740% / 10
% Ionization = 374%
Therefore, the percent ionization of the weak acid in a 1 M solution is 20% (option C).
1. Enthalpy of Neutralization:
The enthalpy of neutralization is the heat released when an acid reacts with a base to form a salt and water. In this case, the enthalpy of neutralization of the weak acid with a strong base is given as -56.1 kJ mol-1.
2. Enthalpy of Ionization:
The enthalpy of ionization is the heat required to completely ionize one mole of a compound. In this case, the enthalpy of ionization of the weak acid is given as 1.5 kJ mol-1.
3. Calculation of Percent Ionization:
The percent ionization can be calculated using the following equation:
% Ionization = (Enthalpy of Neutralization / Enthalpy of Ionization) * 100
Substituting the given values:
% Ionization = (-56.1 kJ mol-1 / 1.5 kJ mol-1) * 100
% Ionization = -3740%
Since the percent ionization cannot be negative, we take the absolute value:
% Ionization = 3740%
However, since the percent ionization cannot exceed 100%, we need to divide by 10:
% Ionization = 3740% / 10
% Ionization = 374%
Therefore, the percent ionization of the weak acid in a 1 M solution is 20% (option C).
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The enthalpy of neutralisation of a weak acid in 1 M solution with a strong base is -56.1 kJ mol-1. If the enthalpy of ionization of the acid is 1.5 kJ mol-1and enthalpy of neutralization of the strong acid with a strong base is -57.3 kJ equiv-1, what is % ionization of the weak acid in molar solution (assume the acid to be monobasic) ?a)10b)15c)20d)80Correct answer is option 'C'. Can you explain this answer?
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The enthalpy of neutralisation of a weak acid in 1 M solution with a strong base is -56.1 kJ mol-1. If the enthalpy of ionization of the acid is 1.5 kJ mol-1and enthalpy of neutralization of the strong acid with a strong base is -57.3 kJ equiv-1, what is % ionization of the weak acid in molar solution (assume the acid to be monobasic) ?a)10b)15c)20d)80Correct answer is option 'C'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about The enthalpy of neutralisation of a weak acid in 1 M solution with a strong base is -56.1 kJ mol-1. If the enthalpy of ionization of the acid is 1.5 kJ mol-1and enthalpy of neutralization of the strong acid with a strong base is -57.3 kJ equiv-1, what is % ionization of the weak acid in molar solution (assume the acid to be monobasic) ?a)10b)15c)20d)80Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The enthalpy of neutralisation of a weak acid in 1 M solution with a strong base is -56.1 kJ mol-1. If the enthalpy of ionization of the acid is 1.5 kJ mol-1and enthalpy of neutralization of the strong acid with a strong base is -57.3 kJ equiv-1, what is % ionization of the weak acid in molar solution (assume the acid to be monobasic) ?a)10b)15c)20d)80Correct answer is option 'C'. Can you explain this answer?.
The enthalpy of neutralisation of a weak acid in 1 M solution with a strong base is -56.1 kJ mol-1. If the enthalpy of ionization of the acid is 1.5 kJ mol-1and enthalpy of neutralization of the strong acid with a strong base is -57.3 kJ equiv-1, what is % ionization of the weak acid in molar solution (assume the acid to be monobasic) ?a)10b)15c)20d)80Correct answer is option 'C'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about The enthalpy of neutralisation of a weak acid in 1 M solution with a strong base is -56.1 kJ mol-1. If the enthalpy of ionization of the acid is 1.5 kJ mol-1and enthalpy of neutralization of the strong acid with a strong base is -57.3 kJ equiv-1, what is % ionization of the weak acid in molar solution (assume the acid to be monobasic) ?a)10b)15c)20d)80Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The enthalpy of neutralisation of a weak acid in 1 M solution with a strong base is -56.1 kJ mol-1. If the enthalpy of ionization of the acid is 1.5 kJ mol-1and enthalpy of neutralization of the strong acid with a strong base is -57.3 kJ equiv-1, what is % ionization of the weak acid in molar solution (assume the acid to be monobasic) ?a)10b)15c)20d)80Correct answer is option 'C'. Can you explain this answer?.
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