Latrell,Sheila,Tenzing,Ysabella

To start off the experiment, safety goggles were first put on by the all the members of the group. The second step was to get a crucible stand and a triangle, for the experiment to be carried on. The crucible stand and the triangle helped place the crucible above the flame in a better position.The next step was to weigh an empty crucible on a scale, which was 23.3grams. An unknown hydrate was then put in the crucible, observation were then made and recorded on the lab sheet. The mass of the crucible and the hydrate were then weighed on a scale and recorded, which was 25.5g. In order to find the mass of the unknown hydrate, the mass of the crucible was subtracted from the mass of the crucible and the unknown hydrate. The unknown hydrate was then heated on iron rings above a flame until no sign of vapor was visible. No sign of vapor meant that the water in the hydrate ceased to exist. The crucible was then removed to cool down for about 5 minutes. After the cooling of the anhydrate, the mass of the crucible and the anhydrate was then recorded. Observations were then made made and to find the mass of the anhydrate, the mass of the crucible(23.3g) was subtracted from the mass of the anhydrate and the crucible(24.6g). Then to find the mass of the water lost the mass of the anhydrate was subtracted from the mass of the unknown hydrate. To find the percent mass water in hydrate, the percent composition formula was used. Then the mass obtained was the compared with the formula mass of different solutions, the one that was closest to the obtained mass of the unknown hydrate was considered to be the identification of the unknown hydrate. Therefore, the mass of the hydrate was closest to Copper (II) Sulfate Pentahydrate. The same process was then repeated for the second unknown hydrate.
 * LAB #16: ** PROCEDURE