In experiment 3, which bag should have the highest final volume? 3% sucrose, gre
ID: 67177 • Letter: I
Question
In experiment 3, which bag should have the highest final volume?
3% sucrose, green
3% sucrose, blue
15% sucrose, red
30% sucrose, yellow
3)
In experiment 4, why was the final water displacement higher than the initial, regardless of the type of potato?
Water flowed out of the potatoes due to osmosis
Water flowed into the potatoes due to osmosis
The tonicity of the potatoes' cells limited water movement
The cells of the potatoes' lysed and collapsed, taking up less space
3% sucrose, green
3% sucrose, blue
15% sucrose, red
30% sucrose, yellow
Procedure 1. Submerge the four pieces of dialysis tubing into a 250 mL beaker filled with 100 mL of water for at least 10 minutes. After 10 minutes, remove one piece of tubing from the beaker. On one end (not the whole tube), gently twirl the tubing into a long, thin cylindrical piece that is able to fit into the hole of the yellow bead 2. Figure 2: Fold the bag until you have a piece narrow enough to be threaded through the bead. 3. Insert the long cylindrical end of th the yellow bead. Once it is through, pull the cylindrical end until there is about 1.5 to 2 cm of tubing extending beyond the bead e tube into the center hole in Take the extra tubing you just pulled through the bead and fold it back over the bead, towards the remaining, non folded tube. Place a rubber band above the bead and around the extra tubing as to be sure no solution can leak out of the tube (see Figure 2) 4. Figure 3: Beads help to secure the ends of the dialysis bags and identify each one. Lab 7: Osmosis To test that no solution can leak out, add a few drops of water and look for water leakage. Make sure you pour the water out before continuing to the next step. 5. Repeat steps 2-4 with the three remaining dialysis tubes, using each of the three remaining bead colors (Figure 3) 6. Table 1 provides a distinction as to what bead belongs to which tube. Using a 10 mL graduated cylinder, measure and fill the appropriate dialysis bag with the designated concentration of su- crose solution (3%, 15% or 30%) by adding the volumes of sucrose and water listed in the tableExplanation / Answer
3) The correct answer is 30% sucrose, Yellow.
Osmosis is the movement of water molecules from a region of low concentration to a region of high concentration through a semipermeable mebrane. As this bag has highest concentration of solution it has the highest volume.
4) The correct answer is The tonicity of the potatoes' cells limited water movement.