Questions are in the data analysis and this is my data
3. After setting up we measured the crucible to weigh 31.353 grams
4. next we measure the mass of the copper chloride hydrate mass using the weigh paper. It came out with a mass of 1.045grams.
Next we put the copper chloride in the crucible
After that we measured them all together and it weighed 32.4 grams.
5. We put the crucible on the clay triangle and did not tilt the lid be cause lab instructor told us not to
6. Next we sparked the flame to the Bunsen burner
7. Now with the Bunsen burner lit we are ready to observe. As the substance started to heat it up it started slowly to turn greenish and then was slowly turning brown. It is turning brown from the outside walls of the substance to the inside. After all the heating it slowly turned a little light brown, but brown.
8. Once heating is completed, turn off the equipment and allow the sample to cool.
a. Turn off the Bunsen burner.
b. Use a pair of crucible tongs to place the crucible on a wire mesh screen on the
bench.
c. With the tongs, move the lid so that it covers the crucible bottom completely.
Allow the sample to cool for about ten minutes.
9. Remove the crucible cover and carefully inspect the sample. If any of the sample has
maintained its initial appearance, reheat the sample until all of it has reacted.
10. After we allowed the sample to cool we then measured it and it had a mass of 32.222 g
11. next we are adding the deionized water to the cooled dried sample. We rinsed out the crucible and added it to the beaker with around a total of 16mL of DI water. Once initially added it was green on the bottom with precipitate was left on the bottom and blue on the top. After we stirred it now it is light blue and clear. It is just really light blue now and clear.
12. we obtained a piece of aluminum wire we coiled it and stirred it. Its turning from blue to greyish color and its fizzing and it getting warmer. After a little bit there is now copper on the bottom of the beaker. They are redish color and the solution on top is also a redish color.
13. we obtained 10mL of 6 M HCl solution. Next we dropped them in and the solution is fizzing again.
14. we put the filter paper on the filter paper and are now filtering the substance.
15. mass of dry watch glass 39.025 grams
16. 39.278 grams and second time was 39.274
Data Analysis: 1. From the mass of copper measured, determine the moles of Cu. 2. Determine the mass of chlorine in the original sample as the difference in mass between the anhydrous sample (after drying in the crucible) and the mass of copper. From the mass of chlorine, determine the moles of Cl. 3. Determine the experimental molar ratio of Cu:C 4. In Step 12, describe the components involved in the reaction. What evidence is there for a chemical reaction? Describe where the reaction is occurring on the molecular level. 5. a. Without attempting to measure the mass of the aluminum, consider the reaction that occurs in step 12, what would an increase in the aluminum mass indicate? b. What would a decrease in the aluminum mass indicate?
