Experimental Procedures
Identification Procedures
Sight/Smell Test
Used the scale to obtain 0.5 g of each of the known substances and placed into their own cell in the microscale wells (being sure to label each cell with the proper substance).
Used the eyes and the nose to compare the physical characteristics of the unknown substance with all of the known substances in the microscale wells (visual appearance and scent). Narrowed down the known substances (keeping the substances that look similar to the unknown substance and ignoring the substances that do not look like the unknown substance). Recorded observations and continued testing with the known substances that passed.
Water Solubility Test
Filled 5 test tubes with 2 mL of distilled …show more content…
In the first beaker, mixed in 1.5 g of the unknown substance. In the second beaker, mixed in 1.5 g of the Ca(NO3)2.
Leave the third beaker alone, it is the control. Placed all three beakers on a hot plate with a thermometer in each. Compared the unknown boiling point, Ca(NO3)2 boiling point, and the control boiling point. Observed and recorded results.
Burn Test
Obtained 0.5 mg of the unknown substance and 0.5 g of Ca(NO3)2. Grinded up both substances until they were a fine powder and started the bunsen burner. Placed a small amount of each powder on the microspatula and placed over the flame. Observed the color of the flame and recorded results.
Nitrate Test
Placed 1 mL of Ca(NO3)2 solution and 1 mL of the unknown substance solution in their own test tube. Cautiously added 3 mL concentrated H2SO4 into the first test tube. Mixed thoroughly and allowed mixture to cool. Inclined the tube at a 45–degree angle, and very carefully poured down the inner side of the tube 2 mL of FeSO4 so that the latter floats on the top of the heavier liquid. Repeated steps 2-4 for the other solution. Observed each of the solutions and determined which passed the test. Recorded
Identification Procedures
Sight/Smell Test
Used the scale to obtain 0.5 g of each of the known substances and placed into their own cell in the microscale wells (being sure to label each cell with the proper substance).
Used the eyes and the nose to compare the physical characteristics of the unknown substance with all of the known substances in the microscale wells (visual appearance and scent). Narrowed down the known substances (keeping the substances that look similar to the unknown substance and ignoring the substances that do not look like the unknown substance). Recorded observations and continued testing with the known substances that passed.
Water Solubility Test
Filled 5 test tubes with 2 mL of distilled …show more content…
In the first beaker, mixed in 1.5 g of the unknown substance. In the second beaker, mixed in 1.5 g of the Ca(NO3)2.
Leave the third beaker alone, it is the control. Placed all three beakers on a hot plate with a thermometer in each. Compared the unknown boiling point, Ca(NO3)2 boiling point, and the control boiling point. Observed and recorded results.
Burn Test
Obtained 0.5 mg of the unknown substance and 0.5 g of Ca(NO3)2. Grinded up both substances until they were a fine powder and started the bunsen burner. Placed a small amount of each powder on the microspatula and placed over the flame. Observed the color of the flame and recorded results.
Nitrate Test
Placed 1 mL of Ca(NO3)2 solution and 1 mL of the unknown substance solution in their own test tube. Cautiously added 3 mL concentrated H2SO4 into the first test tube. Mixed thoroughly and allowed mixture to cool. Inclined the tube at a 45–degree angle, and very carefully poured down the inner side of the tube 2 mL of FeSO4 so that the latter floats on the top of the heavier liquid. Repeated steps 2-4 for the other solution. Observed each of the solutions and determined which passed the test. Recorded