<prompt> A 2 year old child is being evaluated for persistent metabolic acidosis. Blood tests show Na 140mEq1. K 3mEq1, Ca2 8mg1, Mg2 mEql. phosphate 3 mEq1, pH 7.22, bicarbonate 16mEq1 and chloride 112mEq1. The plasma anion gap is:9152225  <response>: Answer is B 15 : Substitution of values for Na, HCO2 andcr in the deduction formula gives us an anion gap value of 15 Plasma electrolyte values in patient Deduction from formula Na 140meq1 Anion Gap : I Because there are more unmeasured anions than cations, the normal anion gap is 10-12 mmo11. e 