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Concentration in Chemistry

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Questions and Answers

What is the primary factor that determines the rate of a chemical reaction?

The type of molecules that are combining

The activation energy required (correct)

The surface area of the solid reactants

The concentration of reactants

How does increasing the temperature affect the rate of a chemical reaction?

It decreases the activation energy, making the reaction faster

It decreases the concentration of the reactants, making the reaction slower

It has no effect on the rate of the reaction

It increases the kinetic energy of the reactant molecules, making the reaction faster (correct)

Which of the following factors would NOT increase the rate of a chemical reaction?

Increasing the surface area of solid reactants

Decreasing the activation energy with a catalyst (correct)

Increasing the pressure of the reactants

Increasing the concentration of the reactants

How does the nature of the reactants, such as their chemical composition and bond types, affect the rate of a chemical reaction?

It determines the activation energy required for the reaction Signup and view all the answers

Which of the following is NOT a factor that can affect the rate of a chemical reaction?

The color of the reactants Signup and view all the answers

If the concentration of an essential element or compound is low, how will that affect the rate of the chemical reaction?

It will decrease the rate of the reaction Signup and view all the answers

How does the presence of a catalyst affect the activation energy of a chemical reaction?

It decreases the activation energy, making the reaction faster Signup and view all the answers

How does increasing the surface area of solid reactants affect the rate of a chemical reaction?

It increases the rate of the reaction Signup and view all the answers

Which of the following factors would have the greatest impact on increasing the rate of a chemical reaction?

Introducing a catalyst Signup and view all the answers

If the activation energy of a reaction is high, what effect will that have on the rate of the reaction?