Reaction Rate

What is the rate of reaction?

• How fast a reaction is 

• How big a reaction is

• How loud a reaction is

• How much gas a reaction produces

Tags

NGSS.HS-PS1-5

A substance that increases speed of chemical reaction without being being changed is called:

• Catalyst

• Acid

• Base

• pressure

Tags

NGSS.HS-PS1-5

Activation energy is required to start a chemical reaction. What is activation energy?

• The energy needed for a reaction to occur

• The minimum amount of energy needed for a reaction to potentially occur

• The energy added by a catalyst

• The energy possessed by the products

Increasing the concentration of the reactants will slow down the reaction.

• false 

• true

Tags

NGSS.HS-PS1-5

Products will form faster if____________

• the particle size of the reactants are larger.

• temperature is decreased.

• concentration of the reactants are increased.

• the reaction is not stirred.

Tags

NGSS.HS-PS1-5

This slows down or even stops a chemical reaction.

• de-activator

• catalyst

• enzyme

• inhibitor

Tags

NGSS.HS-PS1-5

What letter represents the activation energy?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

Why does a higher temperature increase the rate of a reaction?

• it increases both the frequency and energy of particle collisions

• it only increases the frequency of particle collisions

• it only increases the energy of particle collisions

• it reduces the activation energy of the reaction

Tags

NGSS.HS-PS1-5

Which of these will NOT speed up the rate of reaction between a strip of magnesium and hydrochloric acid?

• tightly coil up the strip of magnesium

• cut up the strip of magnesium

• increase the concentration of the hydrocholoric acid

• increase the temperature of the hydrocholoric acid

Tags

NGSS.HS-PS1-5

In which experiment is the rate of reaction between hydrochloric acid and calcium carbonate slowest? 

• A

• B

• C

• D

Tags

NGSS.HS-PS1-5