Escience Lab 6; Diffusion Through Liquids

Lab 6

As you complete the lab, answer the questions below, when completed save with your name and then attach to the Lab 6 drop box.

Experiment 1: Diffusion through a liquid

Table 1: Diffusion Through Liquids

Corn Syrup Material:______Lemon Juice (concentrate)______

Time (sec) Blue Dye Red Dye Blue Dye Red Dye

10 1.7 cm 2.1 cm 0.7 cm 0.6 cm

20 2.2 cm 2.3 cm 0.8 cm 0.7 cm

30 2.2 cm 2.4 cm 0.8 cm 0.8 cm

40 2.3 cm 2.5 cm 1 cm 0.9 cm

50 2.4 cm 2.5 cm 1 cm 0.9 cm

60 2.4 cm 2.5 cm 1 cm 0.9 cm

70 2.4 cm 2.7 cm 1.1 cm 1 cm

80 2.4 cm 2.8 cm 1.1 cm 1 cm

90 2.4 cm 2.8 cm 1.1 cm 1 cm

100 2.5 cm 2.8 cm 1.1 cm 1 cm

110 2.5 cm 2.9 cm 1.2 cm 1.1 cm

120 2.6 cm 2.9 cm 1.2 cm 1.1 cm

Table 2: Diffusion Rate of Dyes in Corn Syrup

Dye Name Molecular Weight Total Distance Traveled (mm) Speed of Diffusion (mm/hr)*

Blue Dye 496 g/mol 26 mm 780 mm/hr

Red Dye 793 g/mol 29 mm 870 mm/hr

Table 3: Diffusion Rate of Dyes in ___lemon juice (lemon concentrate)_____________

Dye Name Molecular Weight Total Distance Traveled (mm) Speed of Diffusion (mm/hr)*

Blue Dye 496 g/m 12 mm 360 mm/hr

Red Dye 793 g/mol 11 mm 330 mm/hr

*multiply total distance traveled by 30 to get the hourly diffusion rate

Graphs (don’t forget to label the axes!): You will need to scan these, if you cannot scan them you may FAX the graphs, or at least describe the graph, the axis labels and what the line(s) look like.

Experiment 1: Questions

1. Which dye diffused the fastest in corn syrup? In your chosen material?

The red dye diffused the fastest in corn syrup. The blue dye diffused the fastest in my chosen material (lemon juice concentrate).

2. Does the rate of diffusion correspond with the molecular weight of the dye?

he rate of diffusion depends on both the molecular weight of the dye and the density of the medium. If the experiment is performed and recorded correctly than technically the smaller/lighter molecules should

3. Does...