Molarity Notes

What is molarity (M) defined as in a solution?

• The mass of solute divided by the volume of the solvent

• The moles of solute divided by the volume of the total solution

• The volume of solute divided by the moles of solvent

• The moles of solvent divided by the mass of solute

How many moles of glucose are needed to make a 2.00 L solution of 1.00 M glucose?

• 1.00 moles

• 2.00 moles

• 3.00 moles

• 4.00 moles

What is the molar mass of glucose used in the calculation?

• 180.156 g/mole

• 150.000 g/mole

• 200.000 g/mole

• 100.000 g/mole

How many grams of glucose are needed to make the solution?

• 180.156 grams

• 360.312 grams

• 540.468 grams

• 720.624 grams

What is the final step in preparing a 2.00 L solution of 1.00 M glucose?

• Add glucose to a beaker and heat it

• Add water to glucose until the volume reaches 2.00 L and stir

• Freeze the solution

• Boil the solution

Write this down on your molarity notes.

M=mol/L. mol = M*L. L=mol/M

• Yes, will do.

• Already done!

Organize these options into the right categories. The formula for molarity is M = mol/L

Groups:

(a) Solved for Molarity

,

(b) Solved for L

,

(c) Solved for moles

,

(d) Incorrect Formula

• L = M/mol

• mol = ML

• M= L/mol

• M =mol/L

• mol = M/L

• L = mol/M

Molarity is a measure of (a)  

• concentration
• dilution
• moles
• clarity

Adding more solute to your solution will make the molarity/concentration

• increase

• decrease

• stay the same

Adding more solvent will make the molarity/concentration

• increase

• decrease

• stay the same