Volumetric Instruments 

Concept #1: Some of the most commonly used volumetric instruments are discussed. 

Concept #2: The following instruments deal with the transportation and isolation of solids. 

Example #1: If a scientist wishes to measure out exactly 25.0 mL of a 0.100 M HCl solution and add it to a 0.200 M NaOH solution, which instrument would be most useful?

a. Transfer pipet

b. Soxlet extractor

c. Graduated cylinder

d. Volumetric flask

e. Buret

Example #2: What is the molarity of a solution made by mixing 200 mL pure water with 100 mL of 0.75 M KCl (aq)?

a. 0.10 M KCl (aq)

b. 0.25 M KCl (aq)

c. 0.50 M KCl (aq)

d. 1.50 M KCl (aq)

e. 2.25 M KCl (aq)

Example #3: How can a 100-fold dilution be achieved?

a. 1 part solvent to 99 parts solution.

b. 90 parts solvent to 10 parts solution.

c. 99 parts solvent to 1 part solution.

d. 100 parts solvent to 1 part solution.

e. 10 parts solvent to 1 part solution.