Baking soda is a bicarbonate (a salt) and vinegar is an acetic acid (the acid that gives vinegar its characteristic taste. 

The pure acid is a colorless viscous liquid or glassy solid).

You can do this by putting baking soda in a rolled up piece of paper and adding vinegar to a empty bottle. 

Then you put the two together, cork it, and shake it up to see the rocket go as high as it can.

They exchange a proton and in this reaction baking soda acts as the base and takes a proton away from vinegar which is an acid. 

The reaction releases gas when the baking soda gains a proton it transforms into water and carbon dioxide.

but when mixed together they form a yellow precipitate solid sulphur.

The rate at which the solution turns cloudy demonstrates the speed 

at which the two compounds are reacting with each other.

and longer ones pass through, 

this causes an increase of reddish color to appear on the overhead.