Equilibrium Constant

If the equilibrium constant is much less than one (K << 1) then

• Equilibrium is not established.

• Equilibrium lies to the right (products are favored)

• Equilibrium lies to the left (reactants are favored)

• Neither products or reactants are favored.

This symbol indicates that a reaction is ____________

• reversible

• irreversible

Tags

NGSS.HS-PS1-6

Find statements that shows that reaction is in the equilibrium

• when concentration of reactants and products does not change with time

• when concentration of reactants and products can change with time

• the forward reaction proceeds at the same rate as the reverse reaction

• the ratio of products times reactants

What are [A] and [B]?

• concentration of reactants

• concentration of products

• energy of reactants

• energy of products

Tags

NGSS.HS-PS1-5

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]

A very high value for K indicates that

• reactants are favored.

• products are favored.

• equilibrium is reached slowly.

• equilibrium has been reached

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]

Calculate Kc for the reaction HI_(g) —> H_2(g) + I_2(g) given that the concentrations of each species at equilibrium are as follows: [HI] = 0.85 mol/L, [I₂] = 0.60 mol/L, [H₂] = 0.27mol/L.

• 0.19

• 0.22

• 4.5

• 5.25

• 160

Tags

NGSS.HS-PS1-6

TRUE or FALSE:

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

• True

• False

Tags

NGSS.HS-PS1-6

TRUE or FALSE:

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

• True

• False