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O-3
INORGANIC CHEMISTRY LABORATORY TECHNIQUES
NAME:
COURSE
I) LECTURE SECTION:
II) LABORATORY SECTION:
1.
MASS MEASUREMENT TECHNIQUE
Follow the procedure given on p.16 of your laboratory manual.
Accurately
(i.e. to 0.001 g) weigh about
1.1xx g of copper solid powder into a 100 mL beaker.
Record the mass measurements on the table given below. (Be sure the mass of sample that you
report has the correct units and number of significant figures.)
mass of beaker and sample:
mass of beaker:
calculated mass of sample:
When you have finished the weighing procedure, discard the copper solid into the “Solid Chemical
Waste” beaker, wash & dry the beaker used and return it to your student drawer.
2.
BURET READING
The reading of the liquid level in a buret should be at the lowest point of the meniscus. To avoid
parallax error, you must make your reading by looking at the graduations on the buret
directly at 90 degrees. The bottom of the transparent meniscus can be more easily determined by
placing a colored strip on a white card, just below the meniscus so that the reflection of the colored
portion of the card on the meniscus makes the meniscus stand out more clearly. The buret should
be read to 0.01 mL. The precision is ±0.02 mL. (Refer to p. 19 of your laboratory manual for further
information.)
buret 1
buret 2
buret 3
buret 4
buret reading (mL)
