Volumetric pipets come in a variety of sizes typically ranging from 0.5 mL to 20
ID: 1050940 • Letter: V
Question
Volumetric pipets come in a variety of sizes typically ranging from 0.5 mL to 200.0 mL. Select the following instances in which a volumetric pipet would be the best choice of glassware. To create a 200.0 mL of a 0.10 M H_2CO_3 solution from a 6 M solution of H_2CO_3. To add about 20 mL of a concentrated KOH solution to a beaker. To titrate a flask containing indicator and H_2SO_4 with 0.1 M NaOH. To prepare a set of diluted HCI solutions requiring volumes of exactly 1.0, 5.0, and 10.0 mL. Based on the choices you selected above, why would a volumetric pipet be used? A volumetric pipet would precisely deliver the proper amount of solution. A volumetric pipet is available in those sizes. A volumetric pipet is the fastest way to accomplish the tasks. Why would a volumetric pipet not be used in the other situations? The amount doesn't need to be as precise as what a volumetric pipet would give. There are other pieces of glassware better suited for these tasks. The chemicals are too dangerous to use with just a volumetric pipet.Explanation / Answer
1) Volumetric pipette is used to
add 20 ml of concetrated KOH to beaker
2) A volumetric pipette precisely delivers proper amount of solution. Hence it is used
3) Pipette is not used in other situations because
Chemicals are too dangerous to use with volumetric pipette