Concentration (Science) Quiz

Solution A has 10 grams of salt and 50 mL of water.

Solution B has 25 grams of salt and 50 mL of water.

Which solution has the most concentration?

• A

• B

A student makes 2 solutions. Solution 1 has 50 mL of water and 25 grams of salt. Solution 2 has 100 mL of water and 14 grams of salt. The student puts all of the solutions in their own cup and places them on a balance to compare. What did this student do wrong?

• She should have made the solutions using the same recipe.

• She should have used different amounts of solid.

• She should have used different amounts of water.

• She should have measured out the same volume of each solution before putting them on the balance.

Green Solution= 50 mL of water and a mass of 75g

Blue Solution=50 mL of water and a mass of 31 g

Orange Solution=50mL of water and a mass of 50 g

Purple Solution=50 mL of water and a mass of 63 g

List the solutions in order from most concentrated to least concentrated.

• blue, orange, purple, green

• green, purple, orange, blue

• purple, blue, orange, green

• green, blue, orange, purple

What is concentration?

• salt

• water

• the ratio of solute to solvent

• whether or not something will float in water

True or False? The more concentration = higher density

• True

• False

What changes will happen when you add more scoops of Kool-Aid powder to water? Click all that apply.

• The concentration will increase.

• The density will increase.

• The taste will become stronger

• The color will become darker.

A student measured out equal volumes of 2 solutions and put them on a balance. Which statement is true?

• The solution with the higher mass is less concentrated.

• The solution with the higher mass is more concentrated.

Solution 1 has 200 mL of water and 4 spoonfulls of solid.

Solution 2 has 400 mL of water and 10 spoonfulls of solid.

Which one has a higher concentration?

• Solution 1

• Solution 2

• They have the same concentration.

Solution 3 has 400 mL of water and 6 spoonfulls of solid.

Solution 4 has 1200 and 18 spoonfulls of solid.

Which solution is more concentrated?

• Solution 3

• Solution 4

• They have the same concentration.

To determine the concentration of a solution...

• Find the mass of equal volumes of each solution.

• Put equal volumes of each solution on a balance and compare them.

• Compare the recipes

• Smell the solution