CHEM 1310 Laboratory
Expt. 8: Rainbow in a Test Tube
Data & Results:
A. Measuring Miscibility of Unknown Soltutions
Table 1. Miscibility Test Mass of Solution (±0.001 g) Volume (±0.05 mL) Density (g/mL)
DIW 0.632 0.60 1.0533
LIG 1.466 1.20 1.222
FIF 1.292 1.00 1.292
HEA 1.460 1.10 1.327
EAC 1.140 1.20 0.950
DCB 1.325 1.00 1.325

B. Measuring Density of Unknown Solutions
Table 2. Density Test Number of layers Polarity
DIW 1 Polar
LIG 1 Polar
FIF 2 Nonpolar
HEA 1 Polar
EAC 2 Nonpolar
DCB 2 Nonpolar

C. Rainbow in a Test Tube
Figure 1. Rainbow in a Test Tube The test tube looks like a rainbow. The order of the colors from bottom to top like in the rainbow is presented as violet, blue, green, yellow, orange, and red respectively. A light violet color (the clear) in on the bottom and does not mix with the blue solution. The blue, green, and orange seem to be the most distinct colors. The yellow seems to blend with the green and orange rather than having a separate color and the red is hard to see. The reason for the yellow mixing with the green is because some of the solution/fluid used with the green was still on the side of the test tube, so when the yellow dye was placed in, the solution/fluid meant to be green had yellow dye mixed in due to being stuck on the side of the test tube and the added …show more content…
The order of densities from most dense to least dense is DCB and HEA, FIF and LIG, DIW, then EAC. Since some of the solutions/fluids have very close densities, the miscibility test was used to determine which solutions/fluids could be next to each other in order not to mix with each other. With acknowledgment that EAC and DIW do not have the same polarity and therefore will be at the top of the test tube with EAC on the very top. DIW and LIG have the same polarity and therefore cannot be next to each other so FIF is in between them. LIG and HEA have the same polarity so DCB must be in between the