Lab 4C Day a.k.a time consuming heating stuff up lab

    Today we had another lab which featured finding and calculating the mass of various objects such as anhydrous salt, empty crucible, water given off, etc.  To begin the lab we had to wear the awesome looking safety goggles.  Then ms. chen previewed over what we should do, and everyone i mean everyone ran to get all the supplies.  Each group of two acquired a pipestem triangle, iron ring, stand, and bunsen burner.  We set up the equipment so that the bunsen burner is directly underneath the crucible which is on the  pipestem triangle that is held midair by the iron ring locked onto the stand.  Before starting the lab we had to turn on the bunsen burner by connecting it to gas and lighting it up in order to dry out the crucible that is placed on the triangle.  Once dry we weigh the crucible and record it.  Shortly after we obtain some anhydrous salt equal to 1/3 of the max volume the crucible can hold and weighed and recorded them down again.  Then comes the fun part........heating stuff up



anhydrous salt





    Now we had to heat the anhydrous salt for 5 min.  During the heating you can see that the anhydrous salt which WAS BLUE TURNED GREENISH WHITE.  After the 5min and seeing cool colour changing, we let it cool and recorded its mass.  This process was repeated to see if the mass were the same.  Then we had to do the last step in our procedure, add water to the dehydrated salt.  As soon as we added a few drops of water.......IT TURNED BACK TOO NORMAL OMGWTH!! NO WAI!!!  Then we recorded down this amazing discovery and dumped it in the garbage.  Then we filled in the rest of the information we needed to fill in with the data from the lab.  As soon as we were done we handed our lab filled with all our data and observation to ms.chen.  It was fun