Chem_Lab

Chem Lab Mole and Mass Relationships NaHCO3(s) + HCl(aq) ® NaCl(aq) + CO2 + H2O(g) Purpose The purpose of the lab was to relate the mass of a product occurring from a chemical equation to that of the mass which was originally predicted through calculation. It was also to learn and understand mole-mass relationships which exist in a chemical reaction and to interpret a balanced chemical equation. Materials and Equipment 6 M Hydrochloric acid (HCL) Burner Sodium Hydrogen Carbonate (NaHCO3) Ring Stand Test Tube (13 x 100mm) Iron Ring Dropper Pipet Wire Gauze Evaporating Dish Watch Glass Microspatula Balance Procedure (record all data to table) 1. a) Clean and flame dry an evaporating dish and allow to cool. b) Find the combined mass of the evaporating dish and watch glass (mass a). 2. Measure 2.50 g of sodium hydrogen carbonate (NaHCO3) to the evaporating dish, while the dish is remaining on the balance (mass b). 3. Set up the ring stand. Place the evaporating dish upon the wire gauze. Then place the watch glass on top of the evaporating dish. 4. a) In a test tube, obtain about 5mL of 6M Hydrochloric acid (HCL). (Use with caution) b) Using a dropper pipet, a few drops at a time, drop the HCL into the NaHCO3. c) Add acid until all bubbling ceases. 5. a) Remove watch glass mass, dish, evaporating, moles, glass, watch, produced, nacl, nahco3, b, grams, equation, until, total, reacted, hcl, experiment, each, co2, chemical, balanced, acid, using, tube, test, subtraction, substance, stand, sodium, set, ring, remaining, react