Which of the following statements about strong acids is true?

A. They have a low dissociation constant (Ka)

B. They completely dissociate in solution

C. They are poor conductors of electricity

D. They have a pH greater than 7

Answer Explanation:

Strong acids completely dissociate into ions when dissolved in water, resulting in a high concentration of \(H^+\) ions in solution. This complete ionization distinguishes them from weak acids.

Therefore, the Correct Answer is B.

Q #1: How does the pH of an acidic solution compare to that of a neutral solution?

A. The pH of an acidic solution is lower than that of a neutral solution

B. The pH of an acidic solution is higher than that of a neutral solution

C. The pH of an acidic solution is the same as that of a neutral solution

D. The pH of an acidic solution is unpredictable

Answer Explanation

The pH scale ranges from 0 to 14, where pH values less than 7 indicate acidic solutions. Therefore, the pH of an acidic solution is lower than that of a neutral solution, which has a pH of 7.
Q #2: What happens to the conductivity of a weak acid solution as it becomes more diluted?

A. Conductivity increases

B. Conductivity decreases

C. Conductivity remains constant

D. It depends on the acid

Answer Explanation

As a weak acid solution becomes more diluted, the concentration of ions decreases, leading to a decrease in conductivity. Weak acids only partially ionize in solution, resulting in fewer ions available to conduct electricity.
Q #3: Which of the following statements about strong acids is true?

A. They have a low dissociation constant (Ka)

B. They completely dissociate in solution

C. They are poor conductors of electricity

D. They have a pH greater than 7

Answer Explanation

Strong acids completely dissociate into ions when dissolved in water, resulting in a high concentration of \(H^+\) ions in solution. This complete ionization distinguishes them from weak acids.

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Which of the following statements about strong acids is true?

More Questions on TEAS 7 Science

Q #1: How does the pH of an acidic solution compare to that of a neutral solution?

Answer Explanation

Q #2: What happens to the conductivity of a weak acid solution as it becomes more diluted?

Answer Explanation

Q #3: Which of the following statements about strong acids is true?

Answer Explanation

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