, When you are done using most glassware in the lab, what should you do? - CORRECT
ANSWERS-Dispose of any chemicals in the proper waste container.
Return the glassware to the appropriate location to dry.
Clean the glassware with a detergent solution.
Put the #s in correct order:
When using the Tare function on a balance, start by
______________ Then, ________________ to cancel out that mass. Finally,
______________ and record the mass of your sample.
1)Add your sample to the glassware
2)Placing the glassware on the balance.
3)Pressing the Tare/Zero button. - CORRECT ANSWERS-2,3,1
What should you do if you are using a balance that has persistent fluctuations in mass?
- CORRECT ANSWERS-Contact your TA or instructor to adjust the balance.
Identify techniques to be used for accurate solution preparation using a volumetric flask.
- CORRECT ANSWERS-Read the liquid volume at eye level from the bottom of the
meniscus.
After the solvent is added, stopper and invert the flask to mix the solution.
Put the #'s in correct order:
In order to use a pipet, place a __________ at the top of the pipet. Use this object to fill
the pipet such that the __________ of the liquid is even with the volume line. Release
the liquid, touching the tip of the pipet to the side of the container if necessary to release
the last drop __________ the pipet tip.
1) Outside
2) Bulb or pump
3) Meniscus - CORRECT ANSWERS-2,3,1
A 24.5 g sample of solution has a density of 0.768 g/mL. What is the sample volume (in
mL)? - CORRECT ANSWERS-31.9 mL
Find the average mass of product:
1)2.73g
2)2.00g
3)1.97g
4)1.47g
5)2.98g
6)2.28g - CORRECT ANSWERS-2.235g
Two students preform a titration multiple times withe the averages being: Student A:
0.125 ± 0.008 M and Student B: 0.12 ± 0.03 M. Who has the more precise work, and
why? - CORRECT ANSWERS-Student A because that student's data has a smaller
standard deviation.
ANSWERS-Dispose of any chemicals in the proper waste container.
Return the glassware to the appropriate location to dry.
Clean the glassware with a detergent solution.
Put the #s in correct order:
When using the Tare function on a balance, start by
______________ Then, ________________ to cancel out that mass. Finally,
______________ and record the mass of your sample.
1)Add your sample to the glassware
2)Placing the glassware on the balance.
3)Pressing the Tare/Zero button. - CORRECT ANSWERS-2,3,1
What should you do if you are using a balance that has persistent fluctuations in mass?
- CORRECT ANSWERS-Contact your TA or instructor to adjust the balance.
Identify techniques to be used for accurate solution preparation using a volumetric flask.
- CORRECT ANSWERS-Read the liquid volume at eye level from the bottom of the
meniscus.
After the solvent is added, stopper and invert the flask to mix the solution.
Put the #'s in correct order:
In order to use a pipet, place a __________ at the top of the pipet. Use this object to fill
the pipet such that the __________ of the liquid is even with the volume line. Release
the liquid, touching the tip of the pipet to the side of the container if necessary to release
the last drop __________ the pipet tip.
1) Outside
2) Bulb or pump
3) Meniscus - CORRECT ANSWERS-2,3,1
A 24.5 g sample of solution has a density of 0.768 g/mL. What is the sample volume (in
mL)? - CORRECT ANSWERS-31.9 mL
Find the average mass of product:
1)2.73g
2)2.00g
3)1.97g
4)1.47g
5)2.98g
6)2.28g - CORRECT ANSWERS-2.235g
Two students preform a titration multiple times withe the averages being: Student A:
0.125 ± 0.008 M and Student B: 0.12 ± 0.03 M. Who has the more precise work, and
why? - CORRECT ANSWERS-Student A because that student's data has a smaller
standard deviation.
