AP Chemistry Unit 8

SiO2 (quartz) and diamonds are ____________________, and they have very high boiling/melting points.

• covalent network solids

• ionic solids

• molecular solids

• interstitial alloys

Which is not needed for a reaction to occur?

• particles must collide at the correct orientation

• particles must collide with a minimum energy

• particles must be large enough to break bonds

A first order reaction graph is

• ln[A] v time

• 1/[A] v time

• [A] v time

Which of these is false in terms of speeding up reactions?

• Adding a catalyst lowers the activation energy

• increasing reactant concentration increases collisions

• increasing surface area decreases collisions

• increasing temperature increases collisions

Tags

NGSS.HS-PS1-5

The taller the “hill” (or activation energy) the slower the reaction.

• True

• False

The fast step (rate-determining step) will dictate the speed of the reaction, and this step will determine the rate law.

• True

• False

Tags

NGSS.HS-PS1-5

Only (aq), (l), and (g) appear in an equilibrium expression.

• True

• False

Tags

NGSS.HS-PS1-6

A larger K means there are ______ products at equilibrium

• more

• less

What happens to K if a reaction is reversed?

• K

• K²

• 2K

• -K

If K<Q, then the reaction shifts to the _________

• left

• right

Tags

NGSS.HS-PS1-6