P.5.5B Formative Studyguide

A student makes a solution and a mixture to study their properties. The mixture contains 20 g of sand and 30 g of gravel. The solution contains 20 g of salt dissolved in 100 g of water. The student passes the mixture through a sieve and observes that sand separates from the gravel. The student then places the solution on a burner for an hour and observes that all of the water evaporates, and salt remains in the container. What can the student conclude about mixtures and solutions from the activity?

• The substances that make up mixtures and solutions can be separated from each other.

• Properties of the substances change during the formations of solutions but not during the formations of mixtures.

• 
  New substances are formed when two or more substances are mixed to form solutions and mixtures.

• The substances that make up mixtures and solutions cannot be recovered after separation.

Tags

NGSS.MS-PS1-2

Which statement best describes a salad?

• A salad is a mixture because it is made of two or more substances that can be easily separated.

• A salad is a solution because it is made of two or more substances that can be easily separated.

• A salad is a mixture because it is made of two or more substances that are not easily separated.

• A salad is a solution because it is made of two or more substances that are not easily separated.

A student is creating a diagram to describe mixtures and solutions. Which statement describes a mixture, but does not describe a solution?

• Two or more substances are combined.

• Included substances can be identified visually.

• 
  Solid substances completely dissolve.

• Salt water is an example.

What is formed when a solute is dissolved into a solvent?

• solution

• element

• compound

• suspension

A student added 5 mg of salt to 200 mL of water. She later added 15 mg of sugar to the same solution. How did adding sugar change the solution?

• It made the solution less concentrated.

• It made the solution more concentrated.

• 
  It reduced the amount of solvent present in the solution.

• 
  It increased the amount of solvent present in the solution.

Tags

NGSS.MS-PS1-2

This table shows different sugar solutions. Which solution is most concentrated?

• solution A

• solution B

• 
  solution C

• solution D

Which definition describes the concentration of a solution?

• the amount of solvent in a solution

• the amount of solvent in a solute

• the relationship between the amount of solute in a solvent

• the relationship between the amount of solvent in a solution

A student makes four different combinations of an orange-flavored drink using the measurements shown in the table. What can be concluded about the concentrations of the flavored drinks?

• Flavored Drinks 1 and 4 have the same concentrations because they have the same amounts of solute.

• Flavored Drinks 1 and 2 have the same concentrations because they have the same amounts of solvent.

• Flavored Drink 2 has the highest concentration because it has more solute dissolved per milliliter of solvent.

• Flavored Drink 3 has the lowest concentration because it has the least amount of solute dissolved per milliliter of solvent.

Tags

NGSS.MS-PS1-2

Which of the following, when added below, will make a solution with the highest concentration? 
5 g of salt + 5 mL of water + ________________________. 

• 5 g of salt

• 10 mL of water

• 5 g of salt + 5 mL of water

• 
  5 g of salt + 10 mL of water

Solutions are _______________ mixtures of two or more substances that spread out evenly and do not settle at the bottom of a container. 

• compound

• suspension

• 
  heterogeneous

• 
  homogenous