Baking powder usually consists of a solid acid and a base. For example sodium bicarbonate and sodium aluminum sulfate. When warm water is added to the dry baking powder, both the acidand base go into solution and start reacting giving out carbondioxide. Hence vigorous bubbling can be observed. NaAl (SO4)2 + 3NaHCO3 ----> Al(OH)3 + 2Na2SO4 + 3 CO2 Solution Baking powder usually consists of a solid acid and a base. For example sodium bicarbonate and sodium aluminum sulfate. When warm water is added to the dry baking powder, both the acidand base go into solution and start reacting giving out carbondioxide. Hence vigorous bubbling can be observed. NaAl (SO4)2 + 3NaHCO3 ----> Al(OH)3 + 2Na2SO4 + 3 CO2.