dilutions

How do we make a dilution?

• Add more solute

• Remove solute

• Remove solvent

• Add more solvent

Tags

NGSS.HS-PS1-5

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

What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?

• 0.067 mL

• 60.0 mL

• 100 mL

• 125 mL

If I have 340.0 mL of a 0.500 M NaBr solution, what will the concentration be if I add 560.0 mL more water to it? (Remember to use the total new volume)

• .188 M

• 3.78 M

• .389 M

• 1.76 M

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO₃ to a volume of 250.0 mL?

• 15.9 M

• 0.636 M

• 0.642 M

• 1.59 M

80 mL of a 5M solution of hydrochloric acid is on hand, but you need to make some 0.1M solution. How many mL of 0.1M solution can you make?

You need 5,000 mL for your students' lab, will you be able to make enough?!?!

• Yes

• No

Match the following

• dilution

• describes the ability for a substance to dissolve at a specific temperature

• solvent

• term that describes the strength or concentration of a solution

• molarity

• a substance that is being dissolved by another substance

• solubility

• adding solvent to make solution less concentrated

• solute

• a substance that dissolves another substance

The higher the molarity, the ________ the solution

• more concentrate

• less concentrated

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