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Chemical Equilibrium quiz

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  • What does it mean when a chemical reaction goes to completion?
    It means all reactants are fully converted into products, leaving no reactant behind.
  • Do most chemical reactions go to completion?
    No, most chemical reactions do not go to completion; some reactant always remains.
  • What is chemical equilibrium?
    Chemical equilibrium is the state where the forward and reverse reactions occur at the same rate, and the concentrations of reactants and products remain constant.
  • How are reversible reactions represented in chemical equations?
    Reversible reactions are represented with double arrows, indicating both forward and reverse processes.
  • What does the symbol k1 represent in a chemical reaction?
    k1 represents the rate constant for the forward direction of the reaction.
  • What does the symbol k-1 represent in a chemical reaction?
    k-1 represents the rate constant for the reverse direction of the reaction.
  • At equilibrium, do the concentrations of reactants and products change?
    No, at equilibrium, the concentrations of reactants and products remain constant over time.
  • What happens to the amount of reactant and product at equilibrium?
    Their amounts plateau and stay constant, indicating equilibrium has been reached.
  • Are molecular-level reactions still occurring at equilibrium?
    Yes, reactions continue at the molecular level, but the overall concentrations do not change.
  • How can you tell from a graph that equilibrium has been reached?
    Equilibrium is reached when the lines representing reactant and product concentrations become flat, showing no further change.
  • Why do the concentrations of reactants and products remain constant at equilibrium?
    Because the rate of the forward reaction equals the rate of the reverse reaction.
  • What is meant by a reversible reaction?
    A reversible reaction is one that can proceed in both the forward and reverse directions.
  • Does equilibrium mean that the amounts of reactants and products are equal?
    No, equilibrium means their concentrations are constant, not necessarily equal.
  • What happens to the product amount as equilibrium is approached?
    The product amount increases until it plateaus at equilibrium.
  • What happens to the reactant amount as equilibrium is approached?
    The reactant amount decreases until it plateaus at equilibrium.