Concentration Calculations in Chemistry

What are the two main components of an aqueous solution?

• Salt and sugar

• Water and oil

• Solvent and solute

• Acid and base

What does the capital M in molarity stand for?

• Mass

• Meters

• Moles per liter

• Milliliters

How do you convert milliliters to liters?

• Divide by 1,000

• Multiply by 100

• Divide by 100

• Multiply by 1,000

What is the molarity of a solution made by dissolving 0.077 moles of solute into 500 milliliters of water?

• 1.54 M

• 0.15 M

• 0.077 M

• 0.154 M

To convert grams of NaCl to moles, what is needed?

• Density of NaCl

• Volume of water

• Temperature of solution

• Molar mass of NaCl

What is the molarity of a solution made from 88 grams of NaCl in 2.5 liters of water?

• 2.5 M

• 1.51 M

• 0.60 M

• 0.35 M

How many moles are in 25 milliliters of a 0.6 M solution of copper (II) chloride?

• 0.6 moles

• 0.0250 moles

• 15 moles

• 0.0150 moles

What principle does dilution follow regarding solute quantity?

• The solute becomes the solvent

• The amount of solute increases

• The amount of solute decreases

• The amount of solute remains the same

After diluting 400 milliliters of a 3.50 M solution with 200 milliliters of water, what is the new molarity?

• 5.85 M

• 1.75 M

• 3.50 M

• 2.33 M

Why can volumes be in milliliters when calculating dilutions?

• Because volume units cancel out

• Because milliliters are easier to measure

• Because it does not affect the concentration

• Because milliliters and liters are interchangeable