Chemistry 101         Quiz 12A            12/4/97            Dr. B. jJackson

121.  To what volume must 10 mL of a 12 N HCl be diluted to produce a 2 N HCl?
     a) 30 mL      b) 24 mL     c) 60 mL    d) 120 mL

122.   How many milliliters of a 12 N HCl would be needed to make 1 liter of 0.1 N solution?
     a) 83         b) 8.3       c) 0.83        d) 12

123.  A buffer is a mixture of a weak acid and a weak base.
     a) true     b) false

124.  If a person hyperventilates during stress, the pH of his/her blood will
     a) rise      b) fall

125.  The major buffer in the body is 
     a) acetic acid & acetate       b) proteins         c) carbonic acid & bicarbonate

126.  Acid A had a Ka of 2.04 x 10-4, and acid B had a Ka of 4.30 x 10-5. Which is the stronger acid?
     a) acid A          b) acid B

127.  If a person had a blood pH of 7.0, he/she would be
     a) suffering from acidosis        b) suffering from alkalosis      c) healthy

128.  What is the pH of a buffer solution of lactic acid.  The pKa of lactic acid is 3.86.  The          
      concentration of the salt is 2 M and the concentration of the acid is 1 M.
     a) 4.06        b) 4.16        c) 5.86        d) 3.36

129.  What is the pKa of an acid with the Ka of    5.4 x 10-4 ?
     a) 5.4      b) 3.3      c)  4.5     d) 6.2

   Ans: 121c; 122b; 123b; 124a; 125c; 126a; 127a; 128b; 129b