Chemistry Laboratory Essay

Identification of your Copper Compound by Percent Mass

Unidentified Compound: #9


The objective of this experiment was to identify the unidentified pure water piping salt substance of #9. To do this, the mass of copper in the unknown was calculated and after that divided by mass of the whole substance to get the percent copper. The molecular pounds was as well calculated by dividing mass of birdwatcher compound employed by moles of compound in unknown sample. The percent copper proportioned out to 31. 6% while the molecular pounds of the test averaged to be able to 201. 1mw. In conclusion, the unknown substance of pure copper sodium was close to Cu(C2H3O2)2 •H2O which has a percent copper of 31. 8% and a molecular pounds of 199. 654mw.


What is the unknown chemical substance and its percent of copper mineral? In this try things out the unfamiliar that is given must be identified. In order to do so the percent mass of water piping in chemical substance must be identified. The molecular mass with the compound will be determined in the percent mass that was found through the copper inside the compound (Lab Manual Page One of Test 2). This kind of experiment is performed to find the not known from a listing of Compounds. Record of compounds has the same commonality inside the amount of copper that is certainly in the substances. (Table 2)

In the try things out, an unknown substance was measured for 2 trials that would be performed and placed in a beaker filled with 50mL of water. The copper inside the compound needed to be dissolved by utilizing hydrochloric acidity and then behave with magnesium in order to just get copper mineral left inside the solution in the bottom of the beaker. The copper mineral should be weighed and then in contrast to the additional compounds (Table 2) in order to find the unfamiliar. This was all performed inside the experiment.


When the try things out started the unknown compound was supplying (#9 was given) then the mass with the unknown was calculated with the analytical harmony for equally trials. The calculated amount of the unfamiliar was then simply placed in a dry 250mL beaker along with 50mL of unadulterated water. The change in color of the water was a bluish green. About several. 0mL of 6M HCl was added and stirred to the beaker of water piping compound not known and water, color of answer turned a lighter green. Copper inside the compound was dissolved and magnesium was added to the perfect solution. The solution started to bubble and was in that case stirred till all magnesium (Mg) responded with answer; both studies were together created. While the solution was reacting, the two filter paperwork were considered and noted in " notebook”.

When ever all alternatives were done reacting with magnesium, the solutions were then included with two vacuum pressure filtration apparatuses. Copper was left on top of the conventional paper and cleaned with 10mL ethanol and 10mL acetone, when the birdwatcher dried. To get both trial offers the birdwatcher was added to a watch a glass after the enjoy glass was weighed after which weighed the copper, filter paper and watch glass collectively for both equally trials. The copper mass was remaining when the conventional paper and watch a glass was deducted from the total weight.

Percent copper was calculated along with skin moles of water piping, moles of unknown and Molecular weight of chemical substance for the two trials.


The mass of unidentified (#9 unidentified compound) that was used inside the experiment pertaining to both studies was measured by an analytical stability. After the unfamiliar was put into the beaker of water and 0. 7mL 6M HCl (Hydrochloric acid), magnesium (mg) was considered by a great analytical balance and then added to solution. The filter newspaper, watch goblet, and dried up materials of copper was all scored with a great analytical harmony. All calculations are displayed in " Table 1” From the research performed.

In order to find the mass of essential copper acquired Equation (1) was used. The mole of both important copper and unknown birdwatcher (which is a same result) was determined by Equation (2). Percent mass of copper was calculated by using Equation (3). Molecular Excess weight of compound was computed using equation(4)....