Lab Day!

So last class we did a lab! about physical and chemical change.

To help us really understand how the lab was going to work Ms. Chen had us make our own flow chart,
consisting of all the steps we had to do in order to make the lab work properly.

Remember always tie any long hair up, wear close toed shoes, and wear lab glasses at all times during a lab until the process is finished! we wouldn't want anything bad happening!

The equipment used were:

• 4 test tubes, labelled A,B,C and D
• a test tube rack
• 4 medicine droppers
• glass square

First off Ms.Chen gave us 4 different unknown solutions for each test tube. In the glass square we combined solutions, A and B, A and C, B and C, A and D, B and D and C and D.
As a result, when the solutions were combined they either changed in color or created tiny bubbles. 
From this we were to figure out weather the mixed solutions had a Physical Change or a Chemical Change.

To decide which one it is here's something to help you out:

1. A physical change is reversible, a chemical change is not. For example, the freezing of water would be a physical change because it can be reversed, whereas the burning of wood is a chemical change - you can't 'unburn' it 

2. A physical change is a change in which no new substance is formed; a chemical change results in the formation of one or more new substances.

Still dont get it? or are a visual learner, check out this vid!
http://www.youtube.com/watch?v=oQnPNBVmwuU&feature=related


Enjoy!