Question 1

Which of the following is not a common characteristic of an acid?

Accepted Answer

Acids typically taste sour, not bitter. Bitter taste is a characteristic of bases, not acids.

Question 2

Which of the following is not a common characteristic of a base?

Accepted Answer

Bases typically turn litmus paper blue, not pink/red. Pink or red is indicative of an acid.

Question 3

One characteristic of basic solution is that

Accepted Answer

Basic solutions have a slippery feel due to the soap-like nature of substances formed when bases react with oils on the skin.

Question 4

A conjugate acid-base pair

Accepted Answer

A conjugate acid-base pair consists of two species that transform into each other by the gain or loss of a proton (H⁺). The acid donates a proton to form its conjugate base, and the base accepts a proton to form its conjugate acid.

Question 5

Which of the following is the conjugate acid of NH₃?

Accepted Answer

The conjugate acid of a base is formed by adding a proton (H+) to the base. In this case, adding H+ to NH₃ would result in NH₄⁺, which is option B.

Question 6

In the reaction:
 The conjugate acid of water is ___.

Accepted Answer

The answer of In the reaction:
 The conjugate acid of...

Question 7

In the reaction: NO₂^- is the

Accepted Answer

The answer of In the reaction: NO₂^- is the ...

Question 8

Which of the following is the conjugate base of the acid, carbonic acid?

Accepted Answer

The answer of Which of the following is the conjugate...

Question 9

Hydrogen sulfide ion, HS^-, can react differently depending on the acidity of the solution in which it is present. These two solutions show that the

Accepted Answer

The answer of Hydrogen sulfide ion, HS^-, can react differently...

Question 10

Which of the following is the conjugate acid of the bicarbonate ion, HCO₃^-?

Accepted Answer

The conjugate acid of a base is formed by adding a proton (H⁺) to it. Adding a proton to HCO₃⁻ results in H₂CO₃.

Question 11

Which of the following is the conjugate base of the bicarbonate ion, HCO₃^-?

Accepted Answer

The conjugate base of the bicarbonate ion (HCO₃⁻) is formed by losing a proton (H⁺), resulting in the carbonate ion (CO₃²⁻).

Question 12

In the equation:

Accepted Answer

The answer of In the equation: 
...

Question 13

Which of the following is the correct statement concerning the equation below?

Accepted Answer

The answer of Which of the following is the correct...

Question 14

Whenever an equilibrium constant, K_eq, has a value greater than 1, which of the following statements is true at equilibrium?

Accepted Answer

When the equilibrium constant (K_eq) is greater than 1, it indicates that the reaction favors the formation of products at equilibrium. Therefore, the concentration of the products is greater than the concentration of the reactants.

Question 15

When a reaction is at equilibrium,

Accepted Answer

At equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction, meaning that the system's composition remains constant over time, not that the amounts of reactants and products are equal.

Question 16

Choose the equilibrium constant that indicates the greatest relative amount of reactant concentration at equilibrium.

Accepted Answer

An equilibrium constant (K) value less than 1 indicates a greater concentration of reactants than products at equilibrium. Among the given options, 1.1 x 10^-7 (Option A) is the smallest and thus indicates the greatest relative amount of reactant concentration at equilibrium.

Question 17

The equation:
 has the following equilibrium constant expression.

Accepted Answer

The answer of The equation:
 has the following equilibrium constant...

Question 18

The equilibrium constant, K_eq, for the ammonia synthesis below is found to be 6.0 x 10^-2 at 500$\degree$C. Which of the following statements is true at equilibrium?

Accepted Answer

The answer of The equilibrium constant, K_eq, for the...

Question 19

The equilibrium constant K_eqfor the reaction of molecular hydrogen and molecular iodine in the gas phase is 54.3 at 430$\degree$C. Which of the following statements is true for this reaction at equilibrium?

Accepted Answer

The answer of The equilibrium constant K_eqfor the reaction...

Question 20

When stress is applied to a system at equilibrium such that the equilibrium is disturbed, the reaction proceeds in the direction that counteracts the disturbance. This explanation best describes ___.

Accepted Answer

Le Châtelier's principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change. This principle explains how a system at equilibrium responds to stress in a way that minimizes the disturbance.

Quiz 7: Acids, Bases, and Equilibrium

Which of the following is not a common characteristic of an acid?

Which of the following is not a common characteristic of a base?

One characteristic of basic solution is that

A conjugate acid-base pair

Which of the following is the conjugate acid of NH3?

In the reaction: The conjugate acid of water is ___.

In the reaction: NO2- is the

Which of the following is the conjugate base of the acid, carbonic acid?

Hydrogen sulfide ion, HS-, can react differently depending on the acidity of the solution in which it is present. These two solutions show that the

Which of the following is the conjugate acid of the bicarbonate ion, HCO3-?

Which of the following is the conjugate base of the bicarbonate ion, HCO3-?