Unit 7 AP Chemistry

As a reaction reaches equilibrium,

• the rate of the forward reaction decreases until it becomes a constant rate greater than the rate of the reverse reaction

• the rate of the forward reaction increase until it becomes a constant rate less than the rate of the reverse reaction

• the rate of the forward reaction decreases until it becomes a constant rate equal to the rate of the reverse reaction

• the rate of the forward reaction increases until it becomes a constant rate equal to the rate of the reverse reaction

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

At equilibrium, rates of the forward and reverse reaction are...

• The same

• Not the same

Tags

NGSS.HS-PS1-6

A system at equilibrium

• Must have reactants and products

• Must have products only

• Must have reactants only

Tags

NGSS.HS-PS1-6

At equilibrium, concentrations of reactants and products are

• equal

• constant

Tags

NGSS.HS-PS1-6

At equilibrium,

• the forward reaction stops occurring

• the reverse reaction stops occurring

• the forward and reverse reactions reactions continue to occur

Tags

NGSS.HS-PS1-6

At what time does the system first reach equilibrium?

• 24s

• 40s

• 60s

• 80s

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

The equilibrium constant expression, Kc, given aA + bB ⇄ cC + dD, is...

•  $K_c\ =\ \frac{\left[C\right]^c\left[D\right]^d}{\left[A\right]^a\left[B\right]^b}$  

•  $K_c\ =\ \frac{\left[A\right]^a\left[B\right]^b}{\left[C\right]^c\left[D\right]^d}$  

Tags

NGSS.HS-PS1-6

Which substance(s) would not be included in a equilibrium constant expression?

• NaCl(s)

• NaCl(aq)

• NaCl(l)

• NaCl(g)

Given the following general equation at equilibrium, 2A +  $B_2$    ⇄ 2AB, the equilibrium expression would be...

•  $K_c\ =\ \frac{\left[AB\right]^{ }}{\left[A\right]^{ }\left[B_2\right]^{ }}$  

•  $K_c\ =\ \frac{\left[AB\right]^2}{\left[A\right]^2\left[B_2\right]^{ }}$  

•  $K_c\ =\ \frac{\left[A\right]^2\left[B_2\right]^{ }}{\left[AB\right]^2}$  

•  $K_c\ =\ \frac{\left[A\right]^{ }\left[B_2\right]}{^{ }\left[AB\right]^{ }}$  

Tags

NGSS.HS-PS1-6

If a K value is greater than 1,

• more products are present at equilibrium

• more reactants are present at equilibrium

Tags

NGSS.HS-PS1-6