Factors Affecting Rate of Reaction

The higher the concentration of a solution, the __________ the rate of reaction.

• decreases

• stabilizes

• increases

• does not affect

Tags

NGSS.HS-PS1-5

The larger the surface area, the __________ the rate of reaction.

• decreases

• stabilizes

• increases

• does not affect

Tags

NGSS.HS-PS1-5

At higher temperatures, the particles have more __________ energy, so __________ more frequently.

• kinetic; collide

• potential; expand

• chemical; react

• thermal; dissolve

Tags

NGSS.HS-PS1-5

Catalysts increase the rate of reaction but are not __________.

• expensive

• consumed

• required

• reusable

Tags

NGSS.HS-PS1-5

The greater the mass of catalyst, the __________ the rate of reaction.

• decreases

• stabilizes

• increases

• does not affect

Tags

NGSS.HS-PS1-5

What observation might you expect when steel wool reacts with oxygen?

• It becomes more flexible.

• It changes color.

• It disintegrates into powder.

• It turns into a liquid.

Tags

NGSS.MS-PS1-2

What factors affect the rate of reaction in the steel wool and oxygen experiment?

• Temperature and pressure

• Catalysts and inhibitors

• Concentration and surface area

• Time and quantity of steel wool

Tags

NGSS.HS-PS1-5

Why does steel wool ignite when exposed to air?

• Due to the high water content in steel wool.

• Because of the friction between air molecules and steel wool.

• As a result of the chemical reaction with oxygen in the air.

• Because steel wool contains flammable chemicals.

Tags

NGSS.HS-PS1-2

What lab safety measures are important while conducting the steel wool experiment? Choose all correct answers.

• Wearing a lab coat and safety goggles.

• Ensuring the lab is at the correct temperature.

• Using a stopwatch to time the reaction.

• Keeping a fire extinguisher nearby.

What changes might be observed in the mixture as the reaction proceeds during the elephant toothpaste experiment?

• Change in color

• Change in temperature

• Formation of foam

• No change is observed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4