The Lab 4C

SOOO... what we did in class. Last day, we basically just had to do a quiz on percent composition and empirical and molecular formulas. That took up almost the whole block.. because it was SO SO SO HARD! *ahem* Me, as well as other studentts agree that everything should be easy peasy :) sooooo make it easierrr please ^^!

ok..so anyways, we didn't do much after that.. we had to do a flow chart on Lab 4C, and copy out the table. That was basically all we had to do! In the next few classes, we are going to determine the percentage of water in hydrate, the moles of water present in a hydrate, and how to write the empirical formula of the hydrate!!!

 This is a gas hydrate.

But anyways today, we did Lab 4C.
In this lab we worked with a bunsen burner... so us, the students could have been in GREAT DANGER!! WAHHH. No... we weren't... but some saftey equipment we needed included a lab apron and safety googles. The purpose of this lab was to determine the percentage of water as well as the number of moles of water present in an unknown hydrate.

First step: Heat the crucible with the bunsen burner and a ring stand to make sure that it is dry enough.

Second step: Let the crucible cool down, then weigh the empty crucible. After, add some of the hydrate into the crucible and weigh that as well. Begin heating the crucible over the bunsen burner for 5 minutes. To make sure the heating is effective, make sure that the tip of the fire is touching the crucible, as it should glow dull red.

Third step: Wait for it to cool down and weigh it again. Now, do a second heating.

This second heating is to confirm the numbers that were found in the first heating, just so we can be more accurate.

Final step: Add drops of water back into the anhydrous compound (the thing that's left in the crucible) and see what you get.

Have fun burning!