It's the reaction of an alkali, or base baking soda with an acid, which is an exciting reaction that releases lots of energy. Baking soda and coke react like baking soda and vinegar. You want it to be thin enough to be able to swirl it around the bottom of the jar, but not thick enough that it clumps up and is hard to move. Once you have these evenly distributed you want to take your distilled water and mix in enough to get the entire mixture to a muddy thick consistency. 3 PARTS BAKING SODA for every 1 PART COCAINE.