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Which of the following solutions when added to 1L of a 0.1 M CH3COOH solution will cause no change in either the degree of dissociation of CH3COOH or the pH of the solution. Ka = 1.8 x 10-5 for CH3COOH?
- a)3 mM HCOOH (Ka = 6 x 10-4)
- b)0.1 M CH3COONa
- c)1.34 mM HCI
- d)0.1 M CH3COOH
Correct answer is option 'C,D'. Can you explain this answer?
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Which of the following solutions when added to 1L of a 0.1 M CH3COOH s...
to which the solution in (C & D) are ISOHYDRIC.
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Which of the following solutions when added to 1L of a 0.1 M CH3COOH s...
Explanation:
To determine which solution will not cause a change in the degree of dissociation of CH3COOH or the pH of the solution, we need to consider the common ion effect.
The common ion effect states that the addition of a salt containing an ion that is already present in a solution will decrease the degree of dissociation of a weak acid or base. This is because the additional ion reduces the concentration of the dissociated species, shifting the equilibrium towards the undissociated form.
In this case, CH3COONa is a salt that contains the acetate ion (CH3COO-), which is the conjugate base of CH3COOH. When CH3COONa is added to the CH3COOH solution, it introduces the acetate ion as a common ion. According to the common ion effect, this will decrease the degree of dissociation of CH3COOH, resulting in a decrease in the concentration of H+ ions and a higher pH. Therefore, option B will cause a change in both the degree of dissociation and the pH of the solution.
On the other hand, option C and D will not cause a change in the degree of dissociation or the pH of the solution.
- Option C is 1.34 mM HCl. HCl is a strong acid and will completely dissociate in water. However, since it is a different acid than CH3COOH, it will not affect the degree of dissociation or the pH of the solution.
- Option D is 0.1 M CH3COOH, which is the same concentration and same acid as the original solution. Adding more of the same acid will not change the degree of dissociation or the pH of the solution.
Therefore, options C and D will cause no change in the degree of dissociation of CH3COOH or the pH of the solution.
To determine which solution will not cause a change in the degree of dissociation of CH3COOH or the pH of the solution, we need to consider the common ion effect.
The common ion effect states that the addition of a salt containing an ion that is already present in a solution will decrease the degree of dissociation of a weak acid or base. This is because the additional ion reduces the concentration of the dissociated species, shifting the equilibrium towards the undissociated form.
In this case, CH3COONa is a salt that contains the acetate ion (CH3COO-), which is the conjugate base of CH3COOH. When CH3COONa is added to the CH3COOH solution, it introduces the acetate ion as a common ion. According to the common ion effect, this will decrease the degree of dissociation of CH3COOH, resulting in a decrease in the concentration of H+ ions and a higher pH. Therefore, option B will cause a change in both the degree of dissociation and the pH of the solution.
On the other hand, option C and D will not cause a change in the degree of dissociation or the pH of the solution.
- Option C is 1.34 mM HCl. HCl is a strong acid and will completely dissociate in water. However, since it is a different acid than CH3COOH, it will not affect the degree of dissociation or the pH of the solution.
- Option D is 0.1 M CH3COOH, which is the same concentration and same acid as the original solution. Adding more of the same acid will not change the degree of dissociation or the pH of the solution.
Therefore, options C and D will cause no change in the degree of dissociation of CH3COOH or the pH of the solution.
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Which of the following solutions when added to 1L of a 0.1 M CH3COOH solution will cause no change in either the degree of dissociation of CH3COOH or the pH of the solution. Ka = 1.8 x 10-5 for CH3COOH?a)3 mM HCOOH (Ka = 6 x 10-4)b)0.1 M CH3COONac)1.34 mM HCId)0.1 M CH3COOHCorrect answer is option 'C,D'. Can you explain this answer?
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Which of the following solutions when added to 1L of a 0.1 M CH3COOH solution will cause no change in either the degree of dissociation of CH3COOH or the pH of the solution. Ka = 1.8 x 10-5 for CH3COOH?a)3 mM HCOOH (Ka = 6 x 10-4)b)0.1 M CH3COONac)1.34 mM HCId)0.1 M CH3COOHCorrect answer is option 'C,D'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following solutions when added to 1L of a 0.1 M CH3COOH solution will cause no change in either the degree of dissociation of CH3COOH or the pH of the solution. Ka = 1.8 x 10-5 for CH3COOH?a)3 mM HCOOH (Ka = 6 x 10-4)b)0.1 M CH3COONac)1.34 mM HCId)0.1 M CH3COOHCorrect answer is option 'C,D'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following solutions when added to 1L of a 0.1 M CH3COOH solution will cause no change in either the degree of dissociation of CH3COOH or the pH of the solution. Ka = 1.8 x 10-5 for CH3COOH?a)3 mM HCOOH (Ka = 6 x 10-4)b)0.1 M CH3COONac)1.34 mM HCId)0.1 M CH3COOHCorrect answer is option 'C,D'. Can you explain this answer?.
Which of the following solutions when added to 1L of a 0.1 M CH3COOH solution will cause no change in either the degree of dissociation of CH3COOH or the pH of the solution. Ka = 1.8 x 10-5 for CH3COOH?a)3 mM HCOOH (Ka = 6 x 10-4)b)0.1 M CH3COONac)1.34 mM HCId)0.1 M CH3COOHCorrect answer is option 'C,D'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following solutions when added to 1L of a 0.1 M CH3COOH solution will cause no change in either the degree of dissociation of CH3COOH or the pH of the solution. Ka = 1.8 x 10-5 for CH3COOH?a)3 mM HCOOH (Ka = 6 x 10-4)b)0.1 M CH3COONac)1.34 mM HCId)0.1 M CH3COOHCorrect answer is option 'C,D'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following solutions when added to 1L of a 0.1 M CH3COOH solution will cause no change in either the degree of dissociation of CH3COOH or the pH of the solution. Ka = 1.8 x 10-5 for CH3COOH?a)3 mM HCOOH (Ka = 6 x 10-4)b)0.1 M CH3COONac)1.34 mM HCId)0.1 M CH3COOHCorrect answer is option 'C,D'. Can you explain this answer?.
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