Dilutions & Osmosis

What is the concentration (in %) of a solution made by dissolving 20 grams of salt in 200 mL of water?

• 5%

• 10%

• 20%

• 2%

If you dilute 50 mL of a 20% sugar solution to 200 mL, what is the new concentration?

• 5%

• 10%

• 20%

• 40%

If there is 200 mL of water, how much CuSO4 should I weigh to get a 10% CuSO4 solution?

• 5 grams

• 10 grams

• 20 grams

• 40 grams

If you add 300mL of water to 100mL of a 10% salt solution, what is the diluted concentration?

• 2%

• 2.5%

• 5%

• 10%

How much water should be added to 50 mL of a 12% solution to make it a 3% solution?

• 100 mL

• 150 mL

• 200 mL

• 250 mL

In which direction will water move across a semipermeable membrane if side A has a 5% salt solution and side B has a 10% salt solution?

• From A to B

• From B to A

• Equally in both directions

• No movement will occur

If a plant cell is placed in pure water, what will likely happen?

• The cell will gain water

• The cell will lose water

• The cell's volume will remain unchanged

• The cell wall will rupture

Compared to my body cells, seawater is...

• hypertonic

• isotonic

• hypotonic

If I place a shell-less egg in a solution and after a few days, the egg's mass is unchanged, then the concentration of the solution compared to the egg is...

• hypertonic

• isotonic

• hypotonic