Honors Chemistry: Quantitative Analysis Laboratory – Precipitation Reaction
Procedure:
DAY 11. Obtain your graduated cylinders and beakers as listed in the ‘Equipment’ section. Also, obtain your
plastic pipettes.
2. Using your 10mL graduated cylinder and one of your plastic pipettes, obtain exactly 10. mL of 0.10M
NaOH solution. Take your NaOH sample back to your lab station and record your observations on the
physical properties in data table 1.
3. Using the other 25mL graduated cylinder and the second, clean pipette, obtain exactly 12 mL of 0.10M
AgNO3 solution. Take your AgNO3 sample back to your lab station and record your observations on the
physical properties in data table 1.
4. Obtain the 150mL beaker. Rinse the beaker with about 20mL of distilled water (DIH2O). Swirl the water
to rinse the entire inner surface of the beaker. Rinse one more time with DIH2O and pour the DIH2O down
the drain.
5. Pour the 0.10M NaOH solution into the rinsed beaker. Then, pour the 0.10M AgNO3 solution into the
beaker. Record your observations in data table 1.
6. Using a glass stirring rod, stir the contents of the beaker continuously for 2 minutes. Then, using the
DIH2O , rinse the stirring rod over the beaker so any product falls back into the beaker. Lastly, rinse the
stirring rod using the tap water from the sink.
7. Obtain a clean piece of filter paper. Using the analytical balance, find the mass of the clean filter paper.
Record this value in data table 2.
8. Set up your filtration apparatus (see teacher setup if necessary). Obtain a 250mL beaker to catch the
filtrate beneath the plastic funnel/filter paper. Fold the filter paper and seat it to the funnel using DIH2O.
9. Pour the contents of the 150mL beaker into the filtration apparatus. Use DIH2O to rinse any remaining
product from the 150mL beaker into the filtration apparatus. Continue the filtration/rinse cycles until
you have collect as much of your product as possible.
10. Obtain a plastic weighing boat and write your name and block on the bottom of the weighing boat using
a black marker. Find the mass of the plastic weighing boat using the analytical balance. Record the mass
of your weighing boat in data table 2.
11. When all of your contents have passed through the filtration apparatus record your observations on both
the filtrate and the content trapped in the filter separately in data table 1.
12. Place the filter paper and its contents in the pre-weighed plastic weighing boat. Place the plastic
weighing boat in the fume hood and allow the contents to sit overnight.
13. Discard your filtrate solution into the sink with excess water. Rinse all glassware and other materials
used in this lab. Discard the plastic pipettes in the trash.
DAY 214. Upon returning to the lab, collect your samples and find the mass of the weighing boat and the filter
paper with the contents using the analytical balance. Record this value in data table 2.
15. Record final observations on the product in the filter in data table 1. Discard your sample in the filter
and the weighing boat in the trash.