Drano is anhydrous HCl and Al flakes.  It 'fizzes' as HCl goes into solution and interacts with the Al ions, producing hydrogen gas (flammable) and AlCl3.  Thus... it's not even on the right track, no base (OH groups) at all.  However, a cool at-home experiment:  Need:  Muriatic acid/Drano crystals  Water  Al foil  Balloon  20 oz bottle.    1.  Pour diluted HCl (bout 30% HCl) into bottle about halfway.  2.  Add tiny balls of Al foil.  3.  Place balloon over lid and allow it to fill with H gas.  4.  Place outside AWAY from people/pets/buildings.  5.  Make a fairly long torch (a meter long or more).  6.  Light balloon.  7.  ???  8.  PROFIT!