<prompt> Carbon dioxide is present maximally inDissolved formHCO3 formRBCsPlasma  <response>: Bicarbonate HCO3- is an anion of carbonic acid in which only one of the hydrogen atoms have been removed, as in sodium bicarbonate NaHCO3. Also called hydrogen carbonate.Ref: Ganong;s review of medical physiology; 23ed edition, page no: 612 