Mixtures and Solutions

Which of these is a method of separating solutions?

• hand seperation

• filtering

• screening

• evaporation

Bob made a dry mixture of gravel, flour, and Epsom salts. He added 50 ml of H2O to the mixture. He wants to separate the materials in this order: First gravel, second flour, and last Epsom salts. What order is the best way to do this?

• evaporation, filtering, screening

• screening, filtering, evaporation

• filtering, screening, evaporation

• evaporation, screening, filtering

Which of these is the most soluble in water?

• cereal

• salt

• baking soda

• citric acid

A solution in which no more material will dissolve is said to be what?

• saturated

• diluted

• concentrated

• solvent

Sue just figured out that it takes about 35g of sugar to saturate a cup of iced tea (about 250ml). She then made a cup of hot tea of the same size. Which amount of sugar might it take to saturate the hot tea?

• 10g

• 25g

• 35g

• 60g

Tags

NGSS.MS-PS1-4

Which of these does not appear as a crystal?

• sand

• salt

• sugar

• snowflake

Which of these solutions has the highest concentration?

• one scoop of detergent and 500ml of water

• one scoop of detergent and 1000ml of water

• two scoop of detergent and 500ml of water

• two scoop of detergent and 1000ml of water

Jessica made a pitcher of lemonade. What can she do to dilute it if she thinks it doesn't taste right?

• add water

• add sugar

• boil the lemonade

• put it in the refrigerator

Two saturated citric-acid solutions made at the same temperature always have the same what?

• amount of citric acid

• amount of water

• concentration

• volume

Material is added to a beaker of clear, colorless liquid. Which of these is evidence that a chemical reaction has taken place?

• bubbles are created

• one material dissolves in the other

• a solution is formed

• the mixture becomes cloudy

Tags

NGSS.MS-PS1-2