Mixtures and Solutions

April measured the mass of the following substances:

Pebbles 30g

Sand 25g

Water 110g

Salt 20g

April then mixed all four substances together in a bowl. What is the mass of the mixture?

• 175g

• 185g

• 100g

• 200g

Tags

NGSS.MS-PS1-2

• Salt is the solute, and water is the solvent

• Salt is the solvent, and water is the solute

• Both salt and water are solvents

• Both salt and water are solute

Tags

NGSS.MS-PS1-2

What would be the best way to separate a mixture of diatomaceous earth powder and water?

• Use a screen

• Use evaporation

• Use filter paper

• Use the water density test

What method is used to separate salt from a saltwater solution?

• magnet

• evaporation

• filtration

• Sifter

In a saltwater solution, the salt _________ or disappears into the water.

• condenses

• evaporates

• melts

• dissolves

Mr. Smith's class is studying mixtures in class. The students stirred powdered drink mix into a cup of water as the teacher explained that the powder was a solute and the water is the solvent.

What type of mixture did they make?

• compound

• solution

• element

• chemical reaction

Knowing the particle size of materials in a mixture, helps you to know _______________________________.

• what the crystals will look like after evaporation

• whether one of the materials will dissolve

• which tools to use to separate them

• how much the mixture will weigh

• 2,1,4,3

• 3,4,1,2

• 4,1,3,4

• 2,3,4,1

Tags

NGSS.MS-PS1-2

If a mixture contains magnetite or iron filings, which tool would be best to separate out these materials?

• filter paper

• a pot with boiling water

• Magnet

• screen

What is the role of a solvent in a solution?

• it dissolves the solute in a solution

• it gets dissolved in a solution

• it helps solids mix together

• it keeps the parts of a solution separated