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Chemical Kinetics: Rate of Reaction and Factors

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Chemical Kinetics: Rate of Reaction and Factors

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Questions and Answers

What does chemical kinetics deal with?

The temperature of reactions

The speed of chemical reactions (correct)

The color change during reactions

The volume of reactants used

How is the rate of a chemical reaction defined?

By the color change of the reactants

By the time it takes for the reaction to start

By the change in concentration of reactants or products per unit time (correct)

By the amount of reactants used

What happens to the concentration of reactants as a chemical reaction proceeds?

Remains constant

Decreases (correct)

Fluctuates randomly

Increases

How is the rate of a chemical reaction calculated?

By dividing the concentration difference by the time interval Signup and view all the answers

What determines the rate of a reaction?

The molecularity of the slowest step Signup and view all the answers

Which type of reactions generally occur rapidly?

Reactions with ions combining Signup and view all the answers

What factor usually causes reactions to slow down over time?

Depletion of reactants Signup and view all the answers

How does the addition of a catalyst affect a reaction?

It accelerates the reaction Signup and view all the answers

What does the rate constant represent in a reaction?

The specific rate of reaction when reactants have a molar concentration of 1 Signup and view all the answers

How does the value of the rate constant affect the speed of a reaction?

Greater rate constant, faster reaction Signup and view all the answers

What is the relationship between rate constant and temperature for a specific reaction?

Rate constant increases with increasing temperature Signup and view all the answers

How does the value of rate constant depend on the concentration of reactants?

Rate constant does not depend on reactant concentration Signup and view all the answers