<prompt> Normal anion-gap metabolic acidosis is seen in -Addisons diseaseDiabetic ketoacidosisRenal failurelactic acidosis  <response>: The normal value for the serum anion gap is 8-16 mEqL. However, there are always unmeasurable anions, so an anion gap of less than 11 mEqL using any of the equations listed in Description is considered normal. For the urine anion gap, the most prominently unmeasured anion is ammonia. Seen in Addisons disease Ref Davidson 23rd edition pg 364 