Class notes
Pre-lab modeule 4
- Course
- CHM 1045L (CHM1045L)
- Institution
- Florida International University
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The Name of the lab report: INTRODUCTION TO LAB TECHNIQUESStudents Name:
Panther ID:
Section Number:
TA name:
Purpose: The lab was designed to instruct students in essential laboratory techniques for
volume measurement. Divided into four parts, it covered burets, volumetric pipettes
graduated cylinders, and beakers. Students performed measurements, recorded data,
calculated average density, and standard deviation, preparing students for subsequent lab
report explanations.
Procedure:
Part 1- Burets and Titrations
In the first part, which centered around Burets and Titrations, a thoroughly washed and
cleaned burette was set up on a secure stand. Once in place, the burette was filled to
capacity, and water was transferred into a precisely 50.0 mL beaker. Meticulous recording of
both initial and final volumes was carried out, ensuring adherenc e t correct significant
figures. Subsequently, the mass of water and its density were calculated based on the
recorded data. Emphasis was placed on precision, and all observations were thoroughly
documented in a dedicated lab notebook. No specific web resources were utiized for this
part, as the focus was hands-on experience and direct measurements from the lab.
Part 2- Volumetric Pipettes
In the second part focusing on Volumetric Pipettes, students utilized pipettes for volume
measurements, transferring liquids into a pre-weighed 50 mL beaker. This step involved
, recording detailed observations, emphasizing the inclusion of units and significant figures for
accuracy. Similar to the first part, calculations for the mass of water and density were
conducted based on the recorded data. Again, no specific web resources were references
for this part, aligning with the primary objective of reinforcing practical skills through direct
engagement with lab equipment.
Part 3- Graduated Cylinder
In the third part, students measured volumes in pre-weighed 50 mL beakers. Readings must
be done from the bottom of the liquid’s meniscus at eye level to avoid parallaxing. According
to UNL Chemsitry (2016) the process involved using a beaker filled with the liquid to be
measured, pouring it into the graduated cylinder, filling it close to the desired volume, and
carefully observing the meniscus to achieve an accurate reading. Students had to use a 100
mL graduated cylinder and estimate volumes with the correct number of significant figures.
final volume.
Part 4- Beakers
The fourth and final part involved Beakers, volumes were measured in a pre-weiged 50 mL
beakers using these common laboratory vessels. Observations were recorded,
measurements were made in triplicate, mirroring the precision required in earlier parts.
Calculations for the mass of water and density based on recoded data were conducted as
before.
Pre-lab questions:
Part 1 Answers
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