1) Which of these are an example of an ACID? a) HNO3(aq) + H2O (l) → NO3-(aq) + H3O+(aq) b) CO32-(aq) + H2O(l) → HCO3-(aq) + OH-(aq) 2) HClO4(aq) + N2H4(aq) → N2H5+(aq) + ClO4-(aq) Which of these is the CONJUGATE BASE a) HClO4 (aq) b) N2H4 (aq) c) N2H5 + (aq) d) ClO4 - (aq) 3) What is the pH of a 0.040 M solution of HClO4? a) 3.27 b) 1.40 c) 1.20 d) 2.65 4) What type of salt is Na2CO3? a) Acidic salt b) Basic salt c) Neutral salt 5) What is the definition of a buffer solution a) A solution that contains a weak acid and its salt (conjugate base) b) A solution that contains a weak base and its salt (conjugate acid) c) A solution which has the ability to maintain its pH when a small amount of strong acid or strong base is added to the solution d) A solution of known concentration 6) How does the common ion effect a compound's solubility? a) Solubility increases - The equilibrium is shifted to the left b) Solubility increases - The equilibrium is shifted to the right c) Solubility decreases - The equilibrium is shifted to the left d) Solubility decreases - The equilibrium is shifted to the right

CHAPTER 7

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