Biochemistry lab Quiz
Which of the following we can obtain 3 buffering system
Ammonia
Phosphate
Acetate
Carbonate
What is the molar ratio for salt/acid required to prepare an acetate buffer at pH=5? knowing that the ka for acetic acid is Ka=1.8×10^-5
1.78
1.78/1
1/1.78
All of the above
Which of the following buffering system is present in the our body
Carbon dioxide
Hemoglobin
H2CO3-
Non of the above
What does a represent, what does b represent, what is the volume need to reach the equivalent point (Answer the question respectively))
pH=pK , equivalence point , 25
pH=pK , equivalence point , 12.5
equivalence point , pH=pK , 25
equivalence point , pH=pK , 12.5
All of the following are characteristics of buffer system except:
It is an aqueous solution containing a weak acid and its conjugate base or a weak base and its conjugate acid
It is used to prevent any change in the pH of a solution
A buffer's pH don't changes at all when little amount of strong acid or base is added to it
Acetate is an example of buffering system
Carbonic acid and Bicarbonate ions are present in the blood in a ratio of
20:1
1:20
20:20
1:1
The enzyme needed for conversion of CO2 and H20 to carbonic acid is
Carbonic hydrolase
Carbonic transferase
Carbonic protease
Carbonic anhydrase
The buffer is an aqueous solution containing a weak acid and its conjugate acid or a weak base and its conjugate base
True
False
Which of the following is the best buffer system to make a solution with pH of 3.6
Acetate
Citrate
Formate
Phosphate
Which on of the following is the correct buffer equation
0%
0
0%
0
0%
0
0%
0
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