Question

model 1 - movement of water in and out of cells
sugar molecules (solute)
water molecules (solvent)
selectively permeable membrane

1. complete the table below by counting the molecules in model 1.

	inside the cell	outside the cell
number of water molecules
ratio of water to sugar

Explanation:

Step1: Count sugar molecules

Count the sugar - molecule symbols (circles) inside and outside the cell. Inside the cell, there are 5 sugar molecules. Outside the cell, there are 11 sugar molecules.

Step2: Count water molecules

Count the water - molecule symbols (plus signs) inside and outside the cell. Inside the cell, there are 13 water molecules. Outside the cell, there are 7 water molecules.

Step3: Calculate water - to - sugar ratios

For the inside of the cell, the ratio of water to sugar is $\frac{13}{5}=2.6$. For the outside of the cell, the ratio of water to sugar is $\frac{7}{11}\approx0.64$.

Answer:

	Inside the Cell	Outside the Cell
Number of water molecules	13	7
Ratio of water to sugar	2.6	$\frac{7}{11}\approx0.64$