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Measured freezing point depression point of a 0.1m aq. Acetic acid solution is 0.19oC. The acid dissociation constant at this concentration will be (in the multiple of 10–5):
Correct answer is '4'. Can you explain this answer?
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Measured freezing point depression point of a 0.1m aq. Acetic acid sol...
To determine the acid dissociation constant (Ka) at a given concentration, we can use the formula:
ΔTf = Kf * m
where ΔTf is the freezing point depression, Kf is the cryoscopic constant (which is a constant for the solvent), and m is the molality of the solution.
In this case, we are given the freezing point depression (ΔTf) as 0.19°C and the molality (m) as 0.1 mol/kg.
Now, we need to find the cryoscopic constant (Kf) for the solvent, which is water in this case. The cryoscopic constant for water is 1.86 °C/m.
Substituting the given values into the formula:
0.19°C = 1.86 °C/m * 0.1 mol/kg
Now, we can rearrange the equation to solve for the acid dissociation constant (Ka):
Ka = ΔTf / (Kf * m)
= 0.19°C / (1.86 °C/m * 0.1 mol/kg)
= 0.19 / (1.86 * 0.1)
= 0.19 / 0.186
≈ 1.02
Therefore, the acid dissociation constant at this concentration is approximately 1.02.
ΔTf = Kf * m
where ΔTf is the freezing point depression, Kf is the cryoscopic constant (which is a constant for the solvent), and m is the molality of the solution.
In this case, we are given the freezing point depression (ΔTf) as 0.19°C and the molality (m) as 0.1 mol/kg.
Now, we need to find the cryoscopic constant (Kf) for the solvent, which is water in this case. The cryoscopic constant for water is 1.86 °C/m.
Substituting the given values into the formula:
0.19°C = 1.86 °C/m * 0.1 mol/kg
Now, we can rearrange the equation to solve for the acid dissociation constant (Ka):
Ka = ΔTf / (Kf * m)
= 0.19°C / (1.86 °C/m * 0.1 mol/kg)
= 0.19 / (1.86 * 0.1)
= 0.19 / 0.186
≈ 1.02
Therefore, the acid dissociation constant at this concentration is approximately 1.02.
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Measured freezing point depression point of a 0.1m aq. Acetic acid solution is 0.19oC. The acid dissociation constant at this concentration will be (in the multiple of 10–5):Correct answer is '4'. Can you explain this answer?
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Measured freezing point depression point of a 0.1m aq. Acetic acid solution is 0.19oC. The acid dissociation constant at this concentration will be (in the multiple of 10–5):Correct answer is '4'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Measured freezing point depression point of a 0.1m aq. Acetic acid solution is 0.19oC. The acid dissociation constant at this concentration will be (in the multiple of 10–5):Correct answer is '4'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Measured freezing point depression point of a 0.1m aq. Acetic acid solution is 0.19oC. The acid dissociation constant at this concentration will be (in the multiple of 10–5):Correct answer is '4'. Can you explain this answer?.
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