The correct formula for determining anion gap is:

Question

Quizplus · Accepted Answer

Anion gap is calculated by subtracting the sum of chloride (Cl) and bicarbonate (HCO3) from the sum of sodium (Na) and potassium (K). This can be represented by the formula: [Na+] - ([Cl-] + [HCO3-]). The correct formula given in choice B rearranges this equation as [Na+] - ([Cl-] + [HCO3-]) = ([Na+] + [K+]) - ([Cl-] + [HCO3-]), which is equivalent to the original formula but includes potassium (K) as well. The other answer choices either do not include potassium or have incorrect signs or denominators.

The Correct Formula for Determining Anion Gap Is