18 Questions
What is the primary purpose of replacing the balance cover after placing the container on the balance pan?
To reduce fluctuations in the balance reading
Why should you never hold down the TARE button or bar on the balance?
It will switch the balance to a different unit of measurement
What should you use to clean the balance pan if a chemical is spilled on it?
The attached brush
Why should you never return excess chemical to its original container?
It may contaminate the original container
What should you do if you weigh out too much chemical?
Transfer the excess to a secondary container
What type of equipment is suitable for weighing chemicals?
Weigh boats, weigh paper, or glassware
What is the primary purpose of rinsing a buret with a small amount of solution before filling it?
To remove any impurities from the buret
What is the function of the stopcock in a buret?
To allow small amounts of the solution to flow out of the buret
What is the correct procedure for removing a container from a balance pan?
Remove the container and then replace the balance cover
What is the purpose of using an indicator in a titration reaction?
To indicate the completion of the reaction by a color change
Why is it important to replace the appropriate lids on all reagent bottles when finished?
To prevent contamination of the reagents
What is the significance of the zero mark on a buret?
It is the point where the buret is filled to
When using a buret, how is the volume typically found?
By reading the number of tenths of milliliters and estimating hundredths of milliliters
What is the purpose of keeping reagents on the plastic on the center bench?
All of the above
Why should you never put anything back into the reagent bottle?
To prevent contamination of the reagent
What is the approximate cost of the balances you will be using?
$2000 to $2500
Why should you use an appropriately labeled spatula for each reagent bottle?
To prevent contamination of the reagent
What should you do with excess solid reagent after use?
Pour it into a beaker or onto weighing paper
Learn the correct steps to take when using a balance in a laboratory setting. Follow these guidelines to ensure accurate measurements and safety in the lab. Improve your laboratory skills with this quiz!
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