Laboratory Techniques

Laboratory Techniques
&
Measurements
Lab #1

January 31 2014
PH 148 Chemistry I

Objectives

• Become familiar with several important laboratory techniques.
• Gain proficiency with some of the common measuring devices used in a chemistry laboratory.
• Determine the volume, mass, length, temperature, and density of objects and liquids.

Materials
Materials
Label or Box/Bag Qty Item Description
Student provides 1
1
1
1
1
1
1
1
1 Metric ruler, cm (centimeter) & mm(millimeter)
Table salt Small number of ice cubes Piece of string Flame source Isopropyl (rubbing) alcohol Tap water Distilled water, 25 mL Paper, 5 cm x 5 cm for weighing chemicals

LabPaq provides 1
1
1
1
1
1
1
1
1 Beaker, 100 mL, glass Cylinder, 25 mL, Plastic 25-mL volumetric flask Pipet, Serological-2mL Bulb, Rubber Goggles-Safety Scale-Digital-500g Test Tube (1), 13 x 100 mm
Thermometer-in-cardboard-tube

Auxiliary Supplies Bag-
CK1 1
1
1 Bolt, Metal .– Small Magnet bar Pipet, Empty Short Stem

Procedures/Data and Observations:

1. Length Measurements
1. Choose any three objects that are shorter than the metric ruler to measure, such as a CD, key, spoon, etc.
2. Measure the objects.’ lengths in centimeters. Estimate to one decimal place. Record the measurements in Data Table 1.
3. Measure the objects.’ lengths in millimeters. Estimate to one decimal place. Record the measurements in Data Table 1.

Data Table 1 – Length Measurements

Object Length (cm) Length (mm)
Stapler 13 cm 128 mm
Golf Tee 6 cm 56 mm
Paper Clip 5 cm 49 mm

2. Warm Water Measurements

1. Fill a 100 mL beaker with 50 mL of hot tap water. Get the water as hot as possible.
2. Use a thermometer to measure the temperature of the water in the beaker using Celsius units. Record the measurements in Data Table 2.
3. Empty 2 full Beaker amounts in to a pot on the stove top, 100 mL and set temperature to