Solutions and Molarity

How can a scientist safely tell whether an unknown solution is salt in water or sugar in water?

• taste the solution

• smell the solution

• test the electrical conductivity of the solution

• filter the solution

True or False? The higher the concentration of a solution the less solutes it has in it.

• True

• False

___________ refers to the amount of solute dissolved in a given amount per volume of solution

• Concentration

• Dilution

• Precipitation

• None of the above

Tags

NGSS.HS-PS1-5

How do we make a dilution?

• Add more solute

• Remove solute

• Remove solvent

• Add more solvent

A solution that has water as the solvent is called a(n).....

• Aqueous Solution

• Water-Based Solution

• Organic Solution

• Dilute Solution

As we dilute a solution.....

• The volume increases and the molarity (M) increases

• The volume increases and the molarity (M) decreases

• The volume decreases and the molarity (M) increases

• The volume decreases and the molarity (M) decreases

Tags

NGSS.HS-PS1-5

How many mL of stock solution of 2M NaCl do you need to prepare 100 mL of 0.150M NaCl?

• 7.5 mL

• 15 mL

• 1333 mL

• 200 mL

How does a solution become supersaturated?

• dissolve lots of solute in it.

• dissolve a little solute in it. 

• dissolve more solute than you should be able to. 

• dissolve a super amount of solvent in it. 

When a solvent contains as much of the solute as it can hold, the solution is said to be

• supersaturated

• diluted

• saturated

• unsaturated

Which is an example of a solute?

• Egg whites

• Sugar

• Water

• Acetone