Equilibrium Warmup

Which of the following is true about chemical reaction at equilibrium

• only the forward reaction stops

• only the reverse reaction stops

• both forward and reverse reactions stop

• the rate constants for the forward and reverse reactions are equal

• the rates of the forward and reverse reactions are equal

Tags

NGSS.HS-PS1-6

Which of the following is true regarding the concentration of the products, for a chemical reaction that is already at equilibrium, assuming no disruptions to the equilibrium?

• the concentrations of products will not change because there are no more products

• the concentrations of products will not change because the limiting reactant is gone

• the concentrations of products will not change because the forward and reverse rates are equal

• the concentrations of products will change continually because of reversibility

Which of the following are equal for a chemical system at equilibrium?

• the concentrations of reactant and products are equal

• the rate constants for the forward and reverse reactions are equal

• the time that a particular atom or molecule spends as a reactant and product are equal

• the rate of the forward and reverse reaction

• all of the above are equal

Tags

NGSS.HS-PS1-6

A chemical equilibrium may be established by starting a reaction with ____________

• reactants only

• products only

• equal quantities of reactants and products

• any quantities of reactants and products

• all of the above

An equilibrium that strongly favors products has _______

• a value of K less than 1

• a value of K greater than 1

• a value of Q greater than 1

• a value of Q less than 1

• K = Q

Tags

NGSS.HS-PS1-6

• I and III

• I and IV
  

• II and III

• II and IV

• None are true, as the concentrations of reactants and products are comparable

• I and III

• I and IV

• II and III

• II and IV

• none are true, as the concentration of reactants and products are essentially the same

Tags

NGSS.HS-PS1-6

If the reaction quotient Q has a smaller value than the related equilibrium constant, K, _________

• the reaction is at equilibrium

• the reaction is not at equilibrium, and will make more products at the expense of the reactants

• the reaction is not at equilibrium, and will make more reactants at the expense of the products

• the value of K will not increase until it is equal to Q

Tags

NGSS.HS-PS1-7

If the reaction quotient Q has a value larger than the related equilibrium constant, K _________

• the reaction is at equilibrium

• the reaction is not at equilibrium, and will make more products at the expense of reactants

• the reaction is not at equilibrium, and will make more reactants at the expense of products

• the value of K will increase until it is equal to Q