Rate of Chemical Reactions

The process by which one or more substances change to produce one or more different substances

• Chemical Process

• Reactant

• Chemical Reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What does the rate of chemical reactions refer to?

• The volume of reactants used

• The pressure under which reactions take place

• The speed at which reactants turn into products

• The temperature at which reactions occur

Tags

NGSS.HS-PS1-5

How can the rate of a reaction be measured?

• By how fast the reactants are used up or products are formed

• By the sound produced during the reaction

• By the temperature change in the reaction

• By the color change of the reactants

Tags

NGSS.HS-PS1-5

What does a graph showing the mass of reactants remaining over time typically demonstrate about the rate of reaction?

• It remains constant throughout the reaction

• It increases as the reaction progresses

• It starts off slow and then speeds up

• It starts off fast and then slows down

Tags

NGSS.HS-PS1-5

What happens to the rate of reaction as the reactants get used up?

• It speeds up

• It remains the same

• It slows down

• It stops completely

Which of the following is NOT a correct unit for measuring the rate of reaction?

• Grams per second

• Centimeters cubed per second

• Moles per minute

• Miles per hour

Tags

NGSS.HS-PS1-5

What is the rate of reaction if 0.6 moles of magnesium are used in 2 minutes?

• 1.2 moles per minute

• 0.2 moles per minute

• 0.3 moles per minute

• 0.6 moles per minute

Tags

NGSS.HS-PS1-5

Which of the following is an example of a slow reaction?

• Boiling water

• Fireworks exploding

• The rusting of iron

• The reaction between magnesium and an acid

Tags

NGSS.HS-PS1-5

Which factor does NOT affect the rate of a chemical reaction?

• Concentration of reactants

• Temperature

• Presence of a catalyst

• Color of reactants

Tags

NGSS.HS-PS1-5

What is the effect of increasing the temperature on the rate of a chemical reaction?

• Decreases the rate

• Increases the rate

• No effect

• Stops the reaction

Tags

NGSS.HS-PS1-5