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4 Written questions

3 Multiple choice questions

  1. a state of balance in which the rates of the forward and reverse reactions are equal; no net change in the amount of reactants and products occurs in the chemical system
  2. the expressions that describes the relationship among the concentrations (or partial pressures) of the substances present in a system at equilibrium. Numerator=products raised to coefficients, and denominator=reactants raised to coefficients. *It depends only on the stoichiometry of the reaction, not on its mechanism
  3. if a system at equilibrium is subjected to a small change the equilibrium tends to shift so as to minimize the effect of the change

3 True/False questions

  1. homogeneous equilibriaan equilibrium involving reactants and/or products in more than one state


  2. equilibrium constant(chemistry) the ratio of concentrations when equilibrium is reached in a reversible reaction (when the rate of the forward reaction equals the rate of the reverse reaction)


  3. law of mass action(chemistry) the law that states the following principle: the rate of a chemical reaction is directly proportional to the molecular concentrations of the reacting substances


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