Lab Day!

Today was lab day!

Today's lab was The Heating and cooling curves of a pure substance

The pure substance we used today was - Dodecanoic Acid
ps. it did not smell good, it made me feel dizzy!

Like all labs our first step was to put on our lab apron and safety goggles

This is one of the most important steps, because you always have to put safety first!

Our objective for the lad was to:

1. investigate the heating process for solid dodecanoic acid
2. investigate the cooling process for liquid dodecanoic acid
3. determine and compare the melting and freezing points of dodecanoic acid

Our next step in this lab was
- decide which role you'll play (one person observes and the other records the data)
- next was to obtain our materials and our acid
Materials

• ring stand
• buret clamp
• hot plate
• test tube
• beaker
• thermometer

This was all the setting up part, next is the fun stuff!!

In our textbook it said to do the heating process first, but instead we did the cooling process first.

This picture represents what our set up looked like, although there was water in the beaker and a test tube in the clamp above the beaker.

It took us around 9 min for the dodecanoic acid to drop from 43'C to 25'C and 13 min for the temperature to get back up and reach 50'C.
We had to complete a table of the temperature at every 30 seconds and observations at every step, then we had to graph it.

It was a lot of Hard work, but it was a really cool experiment!

• The acid went completely solid and it turned white ( it started as a pale yellow clear color)
• Then during the heating process it turned to a white goo before it went to its original state.

:)