WK05

• An acid is a proton donor.
• What is an acid?


  A proton donor.
• A base is a proton acceptor.
• What is a base?


  A proton acceptor.
• What are conjugate acid-base pairs?


  A pair of two species that transform into each other by gain or loss of a proton.
• Conjugate acid-base pairs are a pair of two species that transform into each other by gain or loss of a proton.
• A strong acid is a proton donor that completely dissociates in solution.
• What is a strong acid?


  A proton donor that completely dissociates in solution.
• A weak acid is a proton donor that partially dissociates in solution.
• What is a weak acid?


  A proton donor that partially dissociates in solution.
• The acid dissociation constant, Ka, shows the extent of acid dissociation.
• What is the ionic product of water, Kw?


  Kw = [H+][OH-]
• At 25C, Kw = 1.00 x 10^-14 mol2 dm-6.
• Buffer solution is a system that minimises pH changes on addition of small amounts of acid or a base.
• What is a buffer solution?


  A system that minimises pH changes on addition of small amounts of an acid or a base.
• Rate of reaction is the change in concentration of a reactant or product per unit of time.
• What is rate of reaction?


  The change in concentration of a reactant or product per unit of time.
• Order, m is the order with respect to a reactant is the power to which the concentration of the reactant is raised to in the rate equation.
• What is order, m?


  The order with respect to a reactant is the power to which the concentration of the reactant is raised to in the rate equation.
• Half-life is the time taken for the concentration of the reactant to reduce by half.
• What is half-life?


  The time taken for the concentration of the reactant to reduce by half.
• The rate determining step is the slowest step in the reaction mechanism of a multi-step reaction.
• What is the rate determining step?


  The slowest step in the reaction mechanism of a multi-step reaction.