Chemical and Physical Change Lab – 1/15/14

In class, we performed an experiment in which we mixed samples of baking soda, baking powder,and corn starch with small amounts of water,vinegar,and iodine to observe their chemical reactions. Each powder was mixed with each liquid, and all changes both physical and chemical were recorded.



Now, when given the three powders, you would not be able to tell them apart just by their looks. However, after observing the chemical reactions with the liquids, we discovered that through observing the different chemical and physical reactions, you could tell each substance apart based on its reaction to a liquid. Below are our results.
Baking Soda + Water = No Reaction
Baking Soda + Iodine = No Reaction, Baking Soda retained yellow color of Iodine
Baking Soda + Vinegar = Fizzing/Gas
Baking Powder + Water = Fizzing/Gas
Baking Powder + Iodine = Fizzed, Iodine turned black
Baking Powder + Vinegar = Fizzing/Gas
Corn Starch + Water = No Reaction
Corn Starch + Iodine = Became black in color
Corn Starch + Vinegar = No Reaction


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s