AP Chem 5.1,5.2 Quiz

What effect does temperature have on the rate of chemical reactions in everyday life?

• It slows down the reaction.

• It has no effect on the reaction.

• It speeds up the reaction.

• It reverses the reaction.

Tags

NGSS.HS-PS1-5

What is the abbreviation for reaction?

• rct

• rxn

• rctn

• rctn

For a reaction to occur, molecules must ________________ with a specific orientation and

an adequate amount of energy.

Tags

NGSS.HS-PS1-5

A quantity measured per unit of something else is called a ______________.

• bond

• temperature

• time

• rate

Grinding up an Alka Seltzer tablet is an example of increasing the _____________ of reactant.

A substance that increases the speed of reaction but is not part of the reaction is called a(n) ___________.

What is the general trend of the concentration of products in a chemical reaction over time?

• It decreases

• It increases

• It remains constant

• It fluctuates

For the reaction below, how does the rate of appearance of NH₃ compare to the rate of disappearance of H₂?

 N₂ (g) + 3H₂ (g) → 2NH₃ (g)

• The rate of appearance 2x the rate of disappearance.

• The rate of appearance 2/3 the rate of disappearance.

• The rate of appearance 3/2 the rate of disappearance.

Tags

NGSS.HS-PS1-5

For the reaction A + B → 4C, how does the rate of disappearance of B compare to the rate of appearance (production) of C?

• The rate of disappearance of B is 1/2 the rate of appearance of C

• The rate of disappearance of B is 2x the rate of appearance of C

• The rate of disappearance of B is 4x the rate of appearance of C

• The rate of disappearance of B is 1/4 the rate of appearance of C

Tags

NGSS.HS-PS1-7

HI dissociates to form I₂ and H₂ according to the following equation: 2HI(g) → H₂(g) + I₂(g). If the concentration of HI changes at a rate of –0.25 M/s, what is the rate of appearance of I₂(g)?

• 0.90 M/s

• .125 M/s

• 0.45 M/s

• 0.23 M/s

Tags

NGSS.HS-PS1-5