C 8 Rates And Equibrilium

Question 1

What is the definition of reaction rate?

Answer 1

The change in concentration of reactants or products per unit time.

Question 2

True or False: Increasing temperature generally increases the rate of a chemical reaction.

Answer 2

True

Question 3

Fill in the blank: The rate of a reaction can be affected by the concentration of __________.

Answer 3

reactants

Question 4

What is equilibrium in a chemical reaction?

Answer 4

The state where the rates of the forward and reverse reactions are equal.

Question 5

Multiple Choice: Which factor does NOT affect the rate of a chemical reaction? A) Temperature B) Surface area C) Color D) Concentration

Answer 5

C) Color

Question 6

What is the role of a catalyst in a chemical reaction?

Answer 6

A catalyst increases the rate of a reaction without being consumed in the process.

Question 7

True or False: At equilibrium, the concentrations of reactants and products remain constant.

Answer 7

True

Question 8

What does the term ‘dynamic equilibrium’ mean?

Answer 8

It refers to the condition where the forward and reverse reactions continue to occur at equal rates.

Question 9

Fill in the blank: The __________ principle states that if a system at equilibrium is subjected to a change, the system shifts to counteract that change.

Answer 9

Le Chatelier’s

Question 10

What happens to the equilibrium position when the concentration of reactants is increased?

Answer 10

The equilibrium shifts to the right, favoring the formation of products.

Question 11

Multiple Choice: Which of the following will shift the equilibrium to the left? A) Adding more product B) Increasing temperature C) Decreasing pressure D) All of the above

Answer 11

D) All of the above

Question 12

What is the effect of increasing pressure on a gaseous equilibrium with unequal moles of reactants and products?

Answer 12

The equilibrium shifts towards the side with fewer moles of gas.

Question 13

True or False: A catalyst changes the position of equilibrium.

Answer 13

False

Question 14

What is meant by ‘rate constant’ in a chemical reaction?

Answer 14

The proportionality constant in the rate equation that is specific to a given reaction at a specific temperature.

Question 15

Fill in the blank: The __________ of a reaction is the sum of the powers of the concentration terms in the rate equation.

Answer 15

order

Question 16

Multiple Choice: What is the effect of increasing surface area on the reaction rate? A) Decreases it B) No effect C) Increases it D) Depends on the reaction

Answer 16

C) Increases it

Question 17

What is a reversible reaction?

Answer 17

A reaction that can proceed in both the forward and reverse directions.

Question 18

True or False: The equilibrium constant (K) is temperature dependent.

Answer 18

True

Question 19

What does a large equilibrium constant (K) indicate?

Answer 19

It indicates that the reaction favors the formation of products at equilibrium.

Question 20

Fill in the blank: The __________ effect refers to the change in equilibrium that occurs when a system is subjected to a change in concentration, temperature, or pressure.

Answer 20

Le Chatelier’s

Question 21

What is the term for the maximum amount of product that can be formed from a given amount of reactant?

Answer 21

Theoretical yield

Question 22

Multiple Choice: Which of the following is NOT a factor affecting reaction rates? A) Temperature B) Concentration C) Volume D) Pressure

Answer 22

C) Volume

Question 23

What does the term ‘rate-determining step’ mean?

Answer 23

The slowest step in a reaction mechanism that determines the overall reaction rate.

Question 24

True or False: Increasing the concentration of a reactant will always increase the reaction rate.

Answer 24

False

Question 25

What is the main purpose of conducting experiments to determine reaction rates?

Answer 25

To understand how different conditions affect the speed of chemical reactions.

Question 26

Define rate of reaction?

Answer 26

The rate at which a chemical reactiin takes place

Question 27

Define rate of reaction?

Answer 27

The rate at which a chemical reactiin takes place

Question 28

What is a catalyst?

Answer 28

a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction.

Question 29

What is the definition of reaction rate?

Answer 29

The speed at which reactants are converted into products in a chemical reaction.

Question 30

True or False: Increasing the temperature generally increases the rate of a chemical reaction.

Answer 30

True

Question 31

Fill in the blank: The law of __________ states that at equilibrium, the rate of the forward reaction equals the rate of the reverse reaction.

Answer 31

dynamic equilibrium

Question 32

What effect does increasing concentration have on the rate of reaction?

Answer 32

Increasing concentration typically increases the rate of reaction due to a higher number of reactant particles.