Foss Science Mixtures and Solutions Developing Models

Name four methods for separating a mixture.

• filtering, screening, mixture, stirring
• filtering, screening, evaporation and hand separation
• evaporating, distilling, mixture, filtering
• distillation, mixture, screeing and evapoation

Which one of the following chemicals that you worked with is most soluble in water?

• sugar
• sand
• citric acid
• salt

The point where no more solid(solute) will dissolve and begins collecting on the bottom.

• saturation

• evaporation

• loading

• chromatography

Explain how you know that a solution has become saturated.

• hand separation
• evaporation
• it is clear
• a solid collects on the bottom after stirring or shaking

What are the steps in order to separate the mixture: gravel, diatomaceous earth, salt and 50 ml of water?

• Burp

• 1. Screen the gravel

  2. Stir the mixture

  3. Evaporate the water

• 1. Screen the gravel

  2. Filter the diatomaceous earth

  3. Stir the mixture

• 1. Screen the gravel

  2. Filter the diatomaceous earth

  3. Evaporate the water

Which type of solution will hold more solute: a solution made with 50 ml of hot water or a solution made with 50 ml of cold water?

• hot water because it dissolves more solid than cold water. Temperature effects solubility.

• cold water because it dissolves more water than hot water

Tags

NGSS.MS-PS1-4

Which of these is the greatest concentration?

• 1 scoop of kool-aid and 500 ml of water
• 3 scoops of kool-aid and 1000 ml of water
• 1 scoop of kool-aid and 1000 ml of water
• 3 scoops of kool-aid and 500ml of water

When you are mixing more than one substance, how can you tell if a chemical reaction occurs?

• hand separation

• gas has formed, a change in temperature, a precipitate forms

• evaporation has occurred and saturation is reached

Tags

NGSS.MS-PS1-2

When bubbles form, what state of matter

• liquid
• solid
• gas

Tags

NGSS.MS-PS3-4

My Kool-Aid mix is too sweet.  What can I do to dilute the mixture to improve its taste

• add more Kool- Aid
• add more water
• add sugar