Chemical and Physical Change Lab

Today, we had our first lab of the year! We only worked with mild chemicals, so there wasn't much of a safety issue. For our experiment, we were given 4 unknown chemicals.

We would take one chemical and mix it with another, to see what kind of change occurs, as well as to determine whether it's a physical or a chemical change.

As you all know very well, no new substances are created in a physical change. It is a change that you can always reverse.

However, a chemical change does create new substances, and you can't change it back.

In this lab, we used a glass square and combined the solutions together with a medicine dropper. So if the unknown chemicals are A, B, C, and D, we were to observe the mixtures of AB, AC, AD, BC, BD, and CD. Some of them had no change, but others changed coloured, so it was easy to see the change.

Medicine dropper for mixing the chemicals


The handy-dandy safety goggles


And some test tubes


And now we have to do a lab report...................................... :(