How do bases affect the electrical conductivity of a solution?

A. They decrease conductivity

B. They increase conductivity

C. They have no effect on conductivity

D. It depends on the concentration of the base

Answer Explanation:

Bases increase the electrical conductivity of a solution. This is because bases ionize in water to produce hydroxide ions (\(OH^-\)), which carry an electric charge.

Therefore, the Correct Answer is B.

Q #1: What effect do bases have on indicators like litmus paper?

A. Turn it blue

B. Turn it red

C. Turn it green

D. No effect

Answer Explanation

Bases turn litmus paper blue. Litmus is a common indicator that changes color in response to the acidity or basicity of a solution. In the presence of a base, litmus paper turns blue.
Q #2: Which of the following is a characteristic property of bases?

A. Sour taste

B. Reaction with metals to release water

C. Turn phenolphthalein pink

D. Donate protons

Answer Explanation

One of the characteristic properties of bases is their ability to react with certain metals to release hydrogen gas. This reaction is not as common or vigorous as the reaction of acids with metals but is still a defining property of bases. An example of this reaction is the reaction between sodium hydroxide (\(NaOH\)) and aluminum (\(Al\)), which produces hydrogen gas (\(H_2\)).
Q #3: Which of the following statements about the pH of bases is correct?

A. Bases have a pH greater than 7

B. Bases have a pH equal to 7

C. Bases have a pH less than 7

D. Bases have a pH of 7 and can vary based on concentration

Answer Explanation

Bases have a pH greater than 7 on the pH scale, indicating their alkaline nature. The pH of a base solution increases as the concentration of hydroxide ions (\(OH^-\)) increases.

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How do bases affect the electrical conductivity of a solution?

More Questions on TEAS 7 Science

Q #1: What effect do bases have on indicators like litmus paper?

Answer Explanation

Q #2: Which of the following is a characteristic property of bases?

Answer Explanation

Q #3: Which of the following statements about the pH of bases is correct?

Answer Explanation

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