Dilutions and Molarity Calculations

Dilutions and Molarity Calculations

take notes on paper/chromebook

Multiple Choice

What is a mole?

• 6.022 x 10²³ items

• a fuzzy critter

• a chemistry thing

REVIEWING:

Calculating Molar Mass

• Na₂CO₃

• Ca(NO₃)₂

Fill in the Blank

What is the Molar Mass of CO₂?

Multiple Choice

A measure of how much solute is dissolved in solution or "strength" of solution is called......

• concentrated

• concentration

• dilute

• dilution

DEMONSTRATION: 1 Mol in the beaker - fill in the Teachermade chart as we go

• 2000 mL = .5 Molar

• 1000 mL = 1 M

• 500 mL = 2 M

• 250 mL = 4 M

• 100 mL = 10 M

2 Mol in the beaker - fill in the Teachermade chart as we go

• 2000 mL = 1 Molar

• 1000 mL = 2 M

• 500 mL = 4 M

• 250 mL = 8 M

• 100 mL = 20 M

3 Mol in the beaker - fill in the Teachermade chart as we go

• 2000 mL = 1.5 Molar

• 1000 mL = 3 M

• 500 mL = 6 M

• 250 mL = 12 M

• 100 mL = 30 M

1/2 Mol in the beaker - fill in the Teachermade chart as we go

• 2000 mL = .25 Molar

• 1000 mL = .5 M

• 500 mL = 1 M

• 250 mL = 2 M

• 100 mL = 5 M

Multiple Choice

How do chemists describe the "strength" or concentration of a solution?

• molarity

• concentrated

• diluted

• strong

Multiple Choice

How do chemists calculate molarity?

• grams/mole

• moles/Liter

• ounces/container

Multiple Choice

What is the molarity of 0.50 moles of NaCl in 0.25 L of solution

• 1 M

• 1/2 M

• 2 M

• 1.5 M

Multiple Choice

The higher the molarity, the ________ the solution

• more concentrate

• less concentrated

Multiple Choice

The lower the molarity, the ________ the number of particles in the solution

• fewer

• greater