What is the pH of the phosphate buffer solution in a Sanz ...

[j.rubin]

What is the pH of the phosphate buffer solution in a Sanz electrode?
 
  a. 6.84 c. 7.32
  b. 7.00 d. 7.90

Question 2

Which reaction occurs at the platinum cathode of the Clark electrode?
 
  a. CO2 + H2O  H2CO3  H+ + HCO3
  b. AgCl + KCl  Ag2 + Cl2 + K
  c. O2 + 2H2O + 4e  4OH
  d. 4Ag  4Ag+ + 4e

[jaymee143]

Answer to Question 1

ANS: A
The phosphate buffer solution in the pH electrode has a pH of 6.84.

Answer to Question 2

ANS: C
Oxygen from the blood sample diffuses across the semipermeable plastic membrane into the KCl solution and reacts with the platinum cathode, altering the conductivity of the electrolyte solu-tion. The platinum cathode donates electrons, which reduce oxygen to produce hydroxyl ions.

[j.rubin]

Thanks for the timely response, appreciate it

[aliotak]

TYSM