diffusion

Essay text:

This lab is solely focused on the concentration of sucrose in a potato in relationship to the rate of diffusion. Experimental Design Equipment list: 3 15 cm lengths of dialysis tubing 3 400 mL beakers 1% NaCl solution, 10 mL 5% NaCl solution, 10 mL 10% NaCl solution; 10 mL 1 potato with 4 plugs taken out (approx 3cm each) 0.0M Sucrose, 5-10 mL .33M Sucrose, 5-10 mL .67M Sucrose, 5-10 mL 1.0M Sucrose, 5-10 mL 1 microscope slide 1 Coverslip Scalpel Forceps Compound Microscope LabPro Computer with Logger Pro installed Vernier Conductivity Probe Vernier Gas Pressure Sensor 1 Graduated Cylinder; 10 mL 1 Funnel 1 Craft stick 1 Pipet, 1 mL 1 Thermometer Plastic wrap 1 Onion 1 Cork Borer Distilled Water 1 Balance Paper Towels 1 Wash Bottle with dH2O 1 400 mL beaker for waste liquid 1 Beaker for dH2O Procedure: 1) Open Lab Pro and set the conductivity probe for 2000 uS/cm 2) Get 3 400 mL beakers filled with 300 mL of dH2O; label 1%,5%, and 10% 3) Dry a piece of dialysis tubing and fill with 10 mL of 1% NaCl solution (repeat with 5% and 10%) 4) Place the tubing in the corresponding beaker and stir slowly for approximately 15 seconds 5) After stirring start your data collection let it run for 2 minutes 6) Use LabPro to calculate the rate of diffusion using the line function 7) Clean the area before proceeding to part 2 Part 2 1) Set up your Gas Pressure Sensor by connect it to channel 1 of the LabPro 2) Open the preset data collection table called "22 osmosis" 3) Cut a piece of string that when tied will still fit around your potato 4) Use a cork borer to make 4 well spaced hole in the potato 3 cm down 5) Save the plugs and mark the holes (0...