Factors Affecting Rate of Reaction

Under which of the following conditions will marble (calcium carbonate) react most rapidly with hydrochloric acid?

• Marble chips and concentrated acid at 200C

• Marble powder and dilute acid at 200C

• Marble chips and dilute acid at 400C

• Marble powder and concentrated acid at 400C

Tags

NGSS.HS-PS1-5

The speed of a chemical reaction is called reaction rate. 

• True

• False

Tags

NGSS.HS-PS1-5

Chemical reactions can be reversible or irreversible.

• True

• False

A change in the amount of reactant or product affects the rate of reaction.

• True

• False

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

According to Kinetic Molecular Theory of Gases, as temperature increases, the molecular velocities increases as well

• True

• False

Tags

NGSS.HS-PS3-2

The rate of forward reaction is _______, because of the high concentration of reactants

• lowest

• highest

• moderate

• minimal

Tags

NGSS.HS-PS1-5

Which of the following statement is not true about catalysts?

• They have no effect on the position of equilibrium once it is attained.

• They lessen the time taken to attain equilibrium.

• They speed up a chemical reaction.

• They have effects on the position of equilibrium once it is attained.

Tags

NGSS.HS-PS1-6

How can equilibrium constant be utilized?

• Predict the direction of chemical reaction.

• Predict the level of chemical reaction

• Determine the equilibrium concentration of mixture

• All of the choices

Tags

NGSS.HS-PS1-6

This factor doesn’t affect chemical equilibrium in a reaction.

• Change in catalyst

• Change in pressure

• Change in concentration

• Change in temperature

Tags

NGSS.HS-PS1-6

What represents a reversible reaction in a chemical reaction?

• Double arrows

• Bar

• Single arrows

• None of the choices