Using the Henderson-Hasselbalch Equation, Determine the Accuracy of the Gas

Multiple Choice

Using the Henderson-Hasselbalch equation, determine the accuracy of the gas below. To be considered accurate, it must be within 0.03 pH unit. pH = 7.22, PCO₂ = 49 mm Hg, HCO₃^- = 20 mEq/L

A) This gas is completely accurate.
B) This gas is accurate as the calculated pH is 7.23.
C) This gas is accurate as the calculated pH is 7.20.
D) This gas is inaccurate according to the H-H equation.