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4 Written questions

3 Multiple choice questions

  1. (Q) the value that is obtained when concentrations of reactants and products are inserted into the equilibrium expression. If the concentrations are equilibrium concentrations, Q=K, otherwise Q can't equal K.
  2. 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. (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 True/False questions

  1. 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


  2. equilibrium-constant expressionthe 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. Haber process(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected