Chemical Equilibrium

TRUE or FALSE:

"At equilibrium, the RATES of the forward and reverse reactions are EQUAL"

• True

• False

TRUE or FALSE:

"At equilibrium, the CONCENTRATIONS of reactants and products are EQUAL"

• True

• False

Which is the correct equilibrium constant expression for the following reaction? Fe₂O_3(s) + H_2(g) —> Fe_(s) + H₂O_(g)

• K = [H₂O]3 / [H₂]³

• K = [Fe₂O₃] [H₂]³ / [Fe]²[H₂O]³

• K = [Fe]²[H₂O]³ / [Fe_2O₃] [H₂]³

• K= [Fe] [H₂O] / [Fe₂O₃] [H₂]

• K = [H₂O] / [H₂]

TRUE or FALSE:

"At equilibrium, the CONCENTRATIONS of products STAY the SAME"

• True

• False

Tags

NGSS.HS-PS1-6

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

• The same

• Not the same

A system at equilibrium

• Must have reactants and products

• Must have products only

• Must have reactants only

At what time does the system first reach equilibrium?

• 24s

• 40s

• 60s

• 80s

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

Which of the following statements is true about chemical equilibrium?

• The concentrations of reactants and products are equal.

• The rates of the forward and reverse reactions are equal.

• The reaction stops completely.

• The concentrations of reactants are always higher than products.

In a chemical equilibrium involving gases, what effect does increasing the pressure have on the equilibrium position?

• Shifts towards the side with more moles of gas.

• Shifts towards the side with fewer moles of gas.

• No effect on the equilibrium position.

• Increases the rate of the forward reaction only.

Tags

NGSS.HS-PS1-6