Osmosis

Question 1

What is osmosis?

Answer 1

The movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of lower water concentration

Question 2

Practical) The effect of sugar solutions on plant tissue

Answer 2

1. You cut up a potato into identical cylinders, and get some beakers with different sugar solutions in them.
2. You measure the mas of the cylinders, then leave one cylinder in each beaker for twenty four hours or so
3. Take them out, dry them with a paper towel and measure their masses again
4. If the cylinders have drawn in water by osmosis, they’ll have increased in mass. If water has been drawn out, theyll have decreaded in mass. You can calculate the percentage change in mass.
5. The dependent variable is the chil mass
   6.Reduce the effect of errors by repeating the experiment and calculating a mean percentage change at each concentration.