Why does puting more vinegar with baking soda make the explosion bigger?

Adding more vinegar to baking soda does not necessarily make the explosion bigger. The reaction between baking soda (sodium bicarbonate) and vinegar (acetic acid) produces carbon dioxide gas, which causes the fizzing and bubbling reaction. The amount of gas produced depends on the amount of reactants used, not just the amount of vinegar.

If you add too much vinegar, it can actually hinder the reaction by diluting the baking soda and reducing the amount of carbon dioxide produced. The optimal ratio for the baking soda and vinegar reaction is about 2:1 (baking soda to vinegar).

Therefore, adding more vinegar beyond the optimal ratio will not significantly increase the size of the explosion, and may even reduce it.