Question 1

Which of the following compounds is classified as a strong electrolyte when dissolved in water?

Accepted Answer

NaCl (sodium chloride)

Question 2

What is the main difference between a strong electrolyte and a weak electrolyte in aqueous solution?

Accepted Answer

Strong electrolytes dissociate completely into ions, while weak electrolytes dissociate partially.

Question 3

Which of the following is a non-electrolyte?

Accepted Answer

C\_2H\_5OH (ethanol)

Question 4

A solution of HF (aq) conducts electricity weakly. What does this indicate about HF?

Accepted Answer

HF is a weak electrolyte and dissociates partially.

Question 5

Which of the following equations correctly represents the dissociation of Fe(NO\_3)\_3 in water?

Accepted Answer

$$\mathrm{Fe(NO_3$)_3 (s) \rightarrow Fe$$^{3+}$$ (aq) + 3\ NO_3$^- (aq)}$$

Question 6

Which of the following best describes the species present in a solution of a non-electrolyte?

Accepted Answer

Mostly molecules

Question 7

Benzoic acid (C\_6H\_5COOH) is a weak acid. What would you expect a solution of benzoic acid to contain?

Accepted Answer

Mostly C\_6H\_5COOH and H\^+

Question 8

Which of the following compounds would you expect to conduct electricity strongly in aqueous solution?

Accepted Answer

CaS (calcium sulfide)

Question 9

Which of the following is an example of a weak electrolyte?

Accepted Answer

HC\_2H\_3O\_2 (acetic acid)

Question 10

A student dissolves PbSO\_4 (s) in water and observes no conductivity. What is the best explanation?

Accepted Answer

PbSO\_4 is a non-electrolyte and does not dissociate into ions.

Question 11

Which of the following best describes the conductivity of a solution containing a strong electrolyte?

Accepted Answer

High conductivity

Question 12

Which of the following is a correct statement about non-electrolytes?

Accepted Answer

They do not dissociate into ions and do not conduct electricity.

Question 13

Which of the following is most likely to be found in a solution of CaS (calcium sulfide) in water?

Accepted Answer

Ca\^2+ and S\^2- ions

Question 14

Which of the following is a property of weak electrolytes?

Accepted Answer

They produce mostly molecules and some ions in solution.

Question 15

Which of the following is a strong base and a strong electrolyte?

Accepted Answer

KOH (potassium hydroxide)

Question 16

A solution contains only molecules and does not conduct electricity. Which type of solute was dissolved?

Accepted Answer

Non-electrolyte

Question 17

Which of the following is the best example of a compound that is a weak electrolyte?

Accepted Answer

NH\_3 (ammonia)

Question 18

Which of the following is a correct balanced equation for the dissociation of NaCl in water?

Accepted Answer

$$\mathrm{NaCl (s) \rightarrow Na^+ (aq) + Cl^- (aq)}$$

Question 19

Which of the following would you expect to be present in a solution of HC\_2H\_3O\_2 (acetic acid)?

Accepted Answer

Mostly HC\_2H\_3O\_2 molecules and some H\^+ and C\_2H\_3O\_2\^- ions

Question 20

Which of the following is NOT a strong electrolyte?

Accepted Answer

CH\_3OH (methanol)

Electrolytes and Non-Electrolytes: Classification and Properties

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