Dilutions and Lab Procedure (AP Chemistry)

A student needs to prepare 100 mL of 0.1 M ammonia solution from a 1 M ammonia stock solution. What volume of the 1 M stock solution is required?

• 1 mL

• 10 mL

• 50 mL

• 100 mL

When using the dilution equation M1V1 = M2V2, what does V2 represent?

• The initial volume of the concentrated stock solution.

• The volume of solvent added to the stock solution.

• The total final volume of the diluted solution.

• The volume of solute in the diluted solution.

Which piece of laboratory glassware is most appropriate for accurately preparing a diluted solution to a specific final volume?

• Beaker

• Graduated cylinder

• Volumetric flask

• Erlenmeyer flask

A student needs to prepare 100 mL of 0.1 M ammonia solution from a 1 M ammonia stock solution. Which procedure correctly describes how to prepare this dilution?

• Pour 10 mL of 1 M ammonia into 100 mL of distilled water.

• Draw out ten 1-mL portions of 1 M ammonia and add to 100 mL of distilled water.

• Add 10 mL of 1 M ammonia to a 100-mL volumetric flask and add distilled water to the 100-mL mark.

• Pour 90 mL of distilled water into a 100-mL beaker, then use the same graduated cylinder to add 10 mL of 1 M ammonia.