Normal anion gap is___ mmol/L?: (A) 6-Apr, (B) 12-Jun, (C) 24-Dec, (D) 24-50
Answer is B. The cation normally measured is Na+, and the anions are usually Cl- and HCO3-. The "anion gap" is the difference between unmeasured anions and unmeasured cations and is estimated as Normal range: 8-16 mEq/L