Equilibrium Constants

Which is/are false about an equilibrium constant?

• it is a constant relating amount of product to reactants

• it is a constant relating speed of reaction to concentrations of reactants to their reaction order exponent

• it is a constant that has units

• it is a constant that is temperature specific

• it is a constant that includes concentration or pressure, as well as stoichiometric coefficients

What is favored when your Keq equilibrium constant is significantly above 1 in its value.

• reactants

• products

• amount of catalyst

• reactants & products are equally favored

What is favored when your Keq equilibrium constant is significantly less than 1 in its value.

• reactants

• products

• amount of catalyst

• reactants & products are equally favored

Which of the following is a ratio comparison of amount of product(s) over amount of reactant(s)?

• Equilibrium constant

• Reaction quotient

• Keq

• Q

• all of the other answers are correct

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

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]

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]

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-7

TRUE or FALSE:

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

• True

• False

For any reaction at chemical equilibrium, the concentrations of products and reactants

• are equal.

• change

• remain unchanged

• decrease

Tags

NGSS.HS-PS1-6