Which one of the following statements about 10.0 mL of 0.10 M HCl and 10.0 mL of 0.10 M CH₃COOH solutions is true?
A - VCE - SSCE Chemistry - Question 3 - 2014 - Paper 1
Question 3
Which one of the following statements about 10.0 mL of 0.10 M HCl and 10.0 mL of 0.10 M CH₃COOH solutions is true?
A. Each solution will have the same electrical co... show full transcript
Worked Solution & Example Answer:Which one of the following statements about 10.0 mL of 0.10 M HCl and 10.0 mL of 0.10 M CH₃COOH solutions is true?
A - VCE - SSCE Chemistry - Question 3 - 2014 - Paper 1
Step 1
Each solution will have the same electrical conductivity.
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Answer
This statement is false. HCl is a strong acid and dissociates completely in solution, resulting in higher electrical conductivity compared to acetic acid (CH₃COOH), which is a weak acid and only partially dissociates.
Step 2
Each solution will react completely with 10.0 mL of 0.10 M NaOH solution.
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Answer
This statement is true for HCl since it reacts completely with NaOH. However, for acetic acid, the reaction may not go to completion due to its weak acid nature, making this statement incorrect overall.
Step 3
Each solution will react at the same rate with 1.00 g of magnesium ribbon.
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Answer
This statement is also false. The magnesium will react more vigorously with the strong acid (HCl) compared to the weak acid (CH₃COOH). The rate of reaction is influenced by the strength of the acids.
Step 4
The concentration of H₃O⁺ ions will be greater in the CH₃COOH solution.
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Answer
This statement is false. HCl, being a strong acid, ionizes completely, leading to a greater concentration of H₃O⁺ ions in the HCl solution compared to the CH₃COOH solution.
