7.7 Calculating Equilibrium Concentrations

Review Questions

Multiple Choice

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

• The same

• Not the same

Multiple Choice

A system at equilibrium

• Must have reactants and products

• Must have products only

• Must have reactants only

Multiple Choice

At equilibrium, concentrations of reactants and products are

• equal

• constant

Multiple Choice

At what time does the system first reach equilibrium?

• 24s

• 40s

• 60s

• 80s

Multiple Choice

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

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

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

Multiple Select

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

• NaCl(s)

• NaCl(aq)

• NaCl(l)

• NaCl(g)

Multiple Choice

If a K value is greater than 1,

• more products are present at equilibrium

• more reactants are present at equilibrium