mom

We are ready to represent the best custom paper writing assistance that can cope with any task like mom even at the eleventh hour. The matter is that we posses the greatest base of expert writers. Our staff of freelance writers includes approximately 300 experienced writers are at your disposal all year round. They are striving to provide the best ever services to the most desperate students that have already lost the hope for academic success. We offer the range of the most widely required, however, not recommended for college use papers. It is advisable to use our examples like mom in learning at public-education level. Get prepared and be smart with our best essay samples cheap and fast! Get in touch and we will write excellent custom coursework or essay especially for you.

A solution is a homogeneous mixture, uniform throughout, and usually contains substances. A precipitate (insoluble solid) is formed by a chemical reaction between two soluble compounds. By combining different solutions, it can be observed as to whether each is soluble or insoluble (precipitate formed or no precipitate formed) with each other. Also, given clues as to a solutions identity, the solution can be identified by combining different solutions together. It is hypothesized that each of the six unidentified solutions can be easily and effectively identified by different combinations of the above stated solutions.

Purpose

To identify six solutions contained in coded (A-F) beakers. (Possibilities include Copper (II) Sulfate, Copper (II) Nitrate, Barium Chloride, Sodium Carbonate, Ammonium Sulfate, and Zinc Sulfate).

Background




Refer to Experiment - Solubility and Solutions handout.

Apparatus

- Test tubes (6)

- Test tube holder / rack

- Mixing tray

Materials

-

- Copper (II) Sulfate

- Copper (II) Nitrate

- Barium Chloride

- Sodium Carbonate

- Ammonium Sulfate

- Zinc Sulfate



Procedure

Refer to Experiment - Solubility and Solutions handout.

) The Copper Solutions are blue, contained in test tube E and F.

4) To determine the difference between Ammonium Sulfate and Zinc Sulfate, a solution needed to be found which was soluble with one but not the other. A Carbonate, like Sodium Carbonate (Test tube C) would create a precipitate only with the solution in test tube B, not with D. After checking the Solubility Chart (pg.666, Chemistry 11) it was found that Zinc Sulfate would not be soluble with Sodium Carbonate. Therefore, a precipitate would be formed. Because test tube C (NaCO) only reacted with test tube B, it was determined that test tube B contained Zinc Sulfate, and test tube D contained Ammonium Sulfate.

Results / Observations

Y = Precipitate formed

N = No Precipitate formed

ABCDEFAXYYYNYBYXYNNNCYYXNYYDYNNXNNENNYNXNFYNYNNX



Discussion / Conclusions

1) Identify each of the six solutions

A - Barium Chloride = BaCl

B - Zinc Sulfate = ZnSo4

C - Sodium Carbonate = NaCO

D - Ammonium Sulfate = NH4(SO4)

E - Copper (II) Nitrate = CuNO

F - Copper (II) Sulfate = CuSO4

) Write equations for all reactions where precipitates formed, and indicate which is the precipitate. (PPT = Bold text)

BaCl (aq) + ZnSO4 (aq)(Ba(SO4) (s) + ZnCl (aq) BaCl (aq) + NaCO (aq)(Ba(CO) (s) + NaCl (aq)BaCl (aq) + NH4(SO4) (aq)(Ba(SO4) (s) + (NH4)Cl (aq)BaCl (aq) + CuSO4 (aq)(Ba(SO4) (s) + CuCl (aq)ZnSO4 (aq) +NaCO (aq)(ZnCO (s) +NaSO4 (aq)NaCO (aq) +CuNO (aq)(NaNO (aq) +CuCO (s)NaCO (aq) +CuSO4 (aq)(NaSO4 (aq) +CuCO (s)

) Write a Net Ionic Equation for one precipitate forming reaction

BaCl (aq) + ZnSO4 (aq)(Ba(SO4) (s) + ZnCl (aq)

Ba+ + Cl- + Zn+ + SO4+ ( Ba(SO4) + Zn+ + Cl-

Ba+ + SO4+ ( Ba(SO4) (s)



Mind that the sample papers like mom presented are to be used for review only. In order to warn you and eliminate any plagiarism writing intentions, it is highly recommended not to use the essays in class. In cases you experience difficulties with essay writing in class and for in class use, order original papers with our expert writers. Cheap custom papers can be written from scratch for each customer that entrusts his or her academic success to our writing team. Order your unique assignment from the best custom writing services cheap and fast!