Can anybody think of a reason for why mixing chemicals won't speed up the reaction?

Question

I did a science project where i mixed two chemicals and had to wait for them to change color. Each time i shook it up faster. However, the shaking didnt affect the time it took for the chemical reaction to take place. Any ideas why?

Answer 1

Simply shaking the chemicals up won't nessecarily give them more energy, which would cause them to go faster. If you added a catalyst of some sort or heated up the chemicals, the reaction would be faster.

Have you ever noticed that sugar dissolves faster in hot water than cold water? It's because heat = more energy :]

Answer 2

the shaking probably didn't generate enough heat energy to effect the chemical reaction.

Answer 3

A completely homogeneous reaction isn't sped up by stirring.

Answer 4

it did speed it up you just didn't realize it because you didn't provide it with enough energy. that reaction you did probably required a lot of energy to react quickly.