Concentration Problems

What is the mass percent sugar in a solution made of 100 g of sugar and 400 g of water?

• 30

• 25

• 20

• 15

When a solution is very concentrated, it has a high amount of _________ to _________.

• solute to solvent
• solvent to solute
• solvent to solution
• solution to solute

Concentration is

• the amount of solute in the solvent

• the amount of solvent in the solute

• density

• particle size

Which solution is more concentrated?

Solution 1:

500 mL of water

100 g of salt

Solution 2:

500 mL of water

90 g of salt

• Solution 1

• Solution 2

• They have the same concentration

• I have no idea

Which solution is more concentrated?

Solution 1:

20 mL of water

5 g of salt

Solution 2:

20 mL of water

10 g of salt

• Not enough information to tell

• Solution 1

• Solution 2

• They are equally concentrated

Which solution is more diluted?

Solution 1:

1000 mL of water

60g of salt

Solution 2:

500 mL of water

60 g of salt

• Not enough information to tell

• Solution 1

• Solution 2

• They are equally diluted

The ___ is the thing being dissolved

• solute
• solvent

Solvent is best defined as-

• a mixture in which the substances are spread out evenly between one another and cannot be told apart
• the ability of a substance to dissolve in another substance
• a substance that dissolves in another substance
• a substance into which another substance dissolves

In order to dilute a solution, you need to

• add more of the solid

• add more water

• find the mass

• find the volume

When solute dissolves into a solvent it is called a _____________.

• mixture
• solution
• element