Dr. Jean Weese Leavening Agents - Leavening Chemicals Ammonium bicarbonate NH4H CO3 - NH3 + CO2 + H2O Sodium Bicarbonate Na4H CO3 - CO2 + Na2 CO3 + H2O (Baking Soda)Dr. Jean Weese Leavening Agents - Leavening Chemicals Ammonium bicarbonate NH4H CO3 - NH3 + CO2 + H2O Sodium Bicarbonate Na4H CO3 - CO2 + Na2 CO3 + H2O (Baking Soda)