Calculating Molarity and Solution Preparation

What does molarity measure in a solution?

• The weight of the solute in grams

• The volume of the solvent in liters

• The concentration of solute particles in moles per liter

• The number of solute particles in kilograms

How is molarity calculated?

• M = V/n^2

• M = n*V

• M = n/V

• M = V/n

What is the molarity of a solution containing 0.05 moles of solute in 125 mL of solution?

• 0.60 M

• 0.50 M

• 0.40 M

• 0.25 M

How do you convert mL to L in molarity calculations?

• Multiply by 1000

• Divide by 100

• Multiply by 100

• Divide by 1000

How many moles of sodium hydroxide are in 38 mL of a 0.5 M solution?

• 0.019 moles

• 0.025 moles

• 0.030 moles

• 0.050 moles

To solve for moles in a molarity equation, which formula is used?

• n = V/M

• n = M/V

• n = M+V

• n = M*V

What volume of 2.5 M sulfuric acid is needed for 0.12 moles of sulfuric acid?

• 68 mL

• 48 mL

• 78 mL

• 58 mL

In preparing a solution, what is the final step after adding the solute to the volumetric flask?

• Weigh the flask

• Add distilled water up to the fill line

• Shake vigorously

• Heat the flask

What is the molar mass of copper(II) sulfate pentahydrate?

• 98.96 g/mol

• 159.609 g/mol

• 342.15 g/mol

• 249.7 g/mol

How much copper(II) sulfate pentahydrate is needed to make 100 mL of a 0.4 M solution?

• 9.988 grams

• 8.75 grams

• 10.5 grams

• 12.00 grams