PS 7.4 Formative

A (a)   is the rate at which reactants change into products over time.

Tags

NGSS.HS-PS1-5

An decrease in temperature will _____ the reaction rate.

• increase

• decrease

• not affect

Tags

NGSS.HS-PS1-5

An increase in surface area will _____ the reaction rate.

• increase

• decrease

• not affect

Stirring the reactants will generally _____ the reaction rate.

• increase

• decrease

• not affect

A (a)   is a substance that affects the reaction rate without being used up in the reaction.

Tags

NGSS.HS-PS1-5

Increasing the concentration of a reactant will _____ the reaction.

• increase

• decrease

• not affect

Tags

NGSS.HS-PS1-5

Chemical reactions involve collisions between particles of reactants. If these collisions occur more frequently, then the reaction rate will _____.

• increase

• decrease

• not change

Tags

NGSS.HS-PS1-5

When a catalyst is used in a chemical reaction, the catalyst is written

• above the arrow

• in the reactants

• in the products

• in parentheses

When you add baking soda to vinegar, the mixture fizzes as CO₂ gas is produced. If you added water to the vinegar before you mixed it with the baking soda, what effect would this have on the rate of CO₂ production?

• in would increase

• it would decrease

• it wouldn't change

Tags

NGSS.HS-PS1-5

Which of the following does NOT affect the reaction rate of chemical reactions?

• temperature

• surface area

• stirring

• size of container

Tags

NGSS.HS-PS1-5