Standard_Solution_Lab_Makeup_Quiz

What is a standard solution?

• A solution with unknown concentration
• A solution made only of water
• A solution with a known, precise concentration
• Any solution made in a lab

Which piece of equipment is best for preparing a precise volume of solution?

• Beaker
• Volumetric flask
• Erlenmeyer flask
• Graduated cylinder

What is the formula for molarity?

• M = V / n
• M = mass / volume
• M = n / V
• M = mol × L

To make a 0.500 M solution of NaCl in 1.00 L of water, how many moles of NaCl are needed?

• 0.050 mol
• 0.500 mol
• 5.00 mol
• 50.0 mol

How many grams of NaCl are in 1.00 mol? (Molar mass ≈ 58.5 g/mol)

• 29.3 g
• 58.5 g
• 100.0 g
• 1.00 g

What happens if you overfill a volumetric flask?

• The solution becomes more concentrated
• The molarity increases
• The solution becomes too dilute
• It doesn't matter

What should you do after adding the solute to a volumetric flask?

• Fill it to the top with water immediately
• Stir with a glass rod
• Add water to the calibration line and mix
• Heat the solution

Which of the following is NOT typically used when making a standard solution?

• Volumetric flask
• Wash bottle
• Triple-beam balance
• Bunsen burner

What is the volume of a solution if 0.25 mol of solute is dissolved to make a 0.50 M solution?

• 0.50 L
• 0.25 L
• 1.00 L

What is the role of the funnel in this process?

• To measure volume
• To prevent spills when transferring solute
• To heat solutions
• To hold the solution