Dilution Technique Quiz

What is the initial step in preparing a dilute solution from a concentrated stock solution?

• Determine the final volume needed.

• Label the containers for safety.

• Calculate the number of moles required in the dilute solution.

• Select the appropriate pipet size.

Why is it important to pour the stock solution into another container before using a pipet?

• To measure the exact volume more easily.

• To make it easier to see the meniscus.

• To prevent contamination of the stock solution.

• To ensure the solution is mixed properly.

What is the correct technique for using a pipet to measure liquid?

• Allow the liquid to rise above the line and then adjust to the mark.

• Shake the pipet to remove excess liquid.

• Pipet by mouth to ensure accuracy.

• Use the bulb to force liquid out of the pipet.

What should you do if there is a small amount of liquid remaining in the pipet after transferring?

• Pour it back into the stock solution.

• Use the bulb to force it out.

• Ignore it, as pipets are designed to deliver the exact amount.

• Shake the pipet to remove it.

What is the final step in preparing a dilute solution?

• Label the flask with the concentration.

• Ensure the meniscus is at the correct line in the volumetric flask.

• Mix the solution thoroughly.

• Store the solution in a dark place.