As the title says, that is what happened today. We performed a lab in which we had to separate the water from the substance. The water had to be removed and evaporated up, up, and away.
This was an interesting lab because we used a Bunsen burner. Even though it was fun, we always had to think about safety. So, whenever we saw a Bunsen burner, we assumed that it was on.
In our lab, we followed this procedure:
1. Find the mass of the empty test tube.
2. Fill a test tube with about one centimetre of the hydrate.
3. Carefully place the test tube on the scale and record the mass of the hydrate and test tube.
4. Using extreme caution, connect and light your Bunsen burner. Adjust the gas flow until the flame is about five centimetres tall.
5. Pick up the test tube with the clamps and carefully hold it in above the Bunsen burner.
6. Gently heat the test tube by moving the test tube in and out of the flame for about five minutes or until all the water has boiled away.
7. Carefully re-weigh the test tube ensuring none of the chemicals inside spill.
While following these directions, we observed what was going on. As the hydrate was being heated and the water molecules were evaporating, the solution was changing colour to a light-blue one. After we figured that all the water was boiled away, we measured the mass again. It was important that we did not leave the hydrate in the flame for too long. This is because the anhydrous solution would begin to react with oxygen, changing its composition.
The hydrate changed colour, as shown in the pictures below. The red is how the hydrate looked prior to being separated from water molecules, and the blue was after.
During the experiment, we recorded our mass before heating and mass after heating. We determined how much water was released, and then what percentage of the hydrate was water. Our percent was about 49%, which was four percent off from the actual value of 45%. This means that we still had a little water left to boil out. Finally, we concluded the lab experiment by stating our percent error.
After this lab, we can know understand why ice may burn. Here is the video:
"By trapping the propane within the ice, the propane is released as the ice burns. Burning the ice is only something cool you can do with the clathrate. One of the main benefits of trapping gas in clathrates is the fact that the solid takes up less space than the gas itself. So, you can ship more gas in a small container."
When we were not performing the lab, we were studying for our upcoming test.
Posted by Andrew.
No comments:
Post a Comment