Chapter 7: Foundations of Chemistry Review for TEST

You open a Kool-Aid packet and completely dissolve the flavor crystals in water. Which is true of the water in this case?

• The water was a solvent

• The water was the solute

• The water chemically combined with the Kool-Aid.

Which of these would be a homogeneous mixture?

• Chex Mix

• Cookie Dough

• Kool-Aid

What is the difference between a mixture and a substance?

• mixtures are homogeneous

• mixtures can be separated physically

• mixtures contain only one type of atom

Aluminum and Carbon Dioxide are examples of _________.

• mixtures

• solutions

• substances

Granulated sugar has a greater _______ than a solid cube of

sugar, so will dissolve quicker in water.

• Surface Area

• Catalyst

• Temperature

Which of the following will lower the rate

of reaction?

• increasing the surface area

• decreasing the temperature

• increasing the concentration of

  reactants

Tags

NGSS.HS-PS1-5

Increasing the ____ causes the particles (atoms

or molecules) of the reactants to move more quickly so that

they collide with each other more frequently and with more

energy.

• Catalyst

• Surface Area

• Temperature

• Concentration

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When a solute is dissolved in a solvent, how does the total mass of the solution change?

• It will increase by the exact mass of the sugar.

• It will stay the same.

• It will decrease due to the absorption rate of water.

• It will rise by half the mass of the sugar.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these observations would be a sign of a chemical change?

• Magnets being used

• Making lemonade.

• Shooting fireworks.

• An ice pack melting

Tags

NGSS.MS-PS1-2

A reactant is also known as something that

• fuels a chemical reaction

• results from a chemical reaction

• stabilizes a chemical reaction

• is present before a reaction occurs

Tags

NGSS.MS-PS1-5