Mixtures & Solutions Unit 1 Check-in

If I added 27 grams of salt to water and separated the solution with a hot plate, what amount of salt would be left behind?

• 20g

• 0g

• 27g

• 13.5g

The substance dissolved in the solvent is the _____________.

• solute

• solution

• concentration

• mixture

Which is an example of a solution?

• a bag of candy

• trail mix

• tea

• Lucky Charms cereal

In a solution of saltwater, what is the solvent?

• water

• ice

• salt

• the glass

A solution was made with 200g salt and 2,000 mL of water. Another container had 5,000 mL of water. How much salt would need to be added to make them have the same concentration?

• 200 g

• 500 g

• 1,000 g

• 5,000 g

Two students make two solutions. Solution 1= 50 mL of water and 24g of solid. Solution 2= 100mL of water and 12g of the same solid. They put the two cups on either side of a balance to find out which solution is more concentrated.

What is wrong with this procedure?

• The should have evaporated the liquids before weighing them.

• They should have compared equal volumes of the two solutions.

• They should have used different solids to make the solutions.

• They followed a procedure to find density, not concentration.

If Solution 1 has 2 spoonful's of solid and 100 mL of water and Solution 2 has 6 spoonful's of solid and 300 mL of water, how do the concentrations compare?

• Solution 1 > Solution 2

• Solution 1 < Solution 2

• Solution 1 = Solution 2

• Not enough information to find the answer

According to the table, which substance is the densest?

• Honey

• Water

• Baby Oil

• Glycerine

Ocean water is a solution?

• True

• False

Mixtures are combinations of two materials that change physical properties once combined.

• True

• False