Rates/Rate law/Mechanisms

The rate of a reaction is dependent on the concentration of the reactants

• True

• False

Tags

NGSS.HS-PS1-5

What does collision theory state?

• For a reaction to occur, particles must collide with sufficient energy.

• For a reaction to occur, particles must collide with proper orientation.

• Both of the above are correct.

Tags

NGSS.HS-PS1-5

The K value of a reaction is dependent on the concentration of the reactants.

• True

• False

Tags

NGSS.HS-PS1-5

What does a catalyst do?

• Increase the rate of all steps of a reaction.

• Lowers the activation energy of the slow step

• Cools the reaction down

• Increases the concentration of the reaction

Tags

NGSS.HS-PS1-5

In an exothermic reaction, heat is ...

• absorbed

• released

Tags

NGSS.HS-PS1-4

In an endothermic reaction....

• The products have more energy then the reactants.

• The reactants have more energy then the products.

Tags

NGSS.HS-PS1-4

What type of reaction occurs in a hand warmer

• exothermic
• endothermic

Tags

NGSS.HS-PS1-4

This helps to speed up a reaction but does not take part in the chemical reaction. 

• coeffiecents
• reactants
• catalyst
• combustion

Located on the left side of the reaction

• reactants
• products

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

• A
• B
• C
• D

Tags

NGSS.HS-PS1-5