Experiment 2 Solids Mass Volume Density
SOLIDS: Mass, Volume and Density Measurements
A. Overview
Review Sections 1.4 - 1.6 in your textbook (Chemistry: The Central Science, 9th Ed. , Brown, LeMay, Bursten, & Burdge)
This experiment will introduce you to a very important concept in science, especially chemistry: DENSITY. Density is the relationship between the mass of an object and the volume which it occupies. Solid substances generally have the greatest density, normally in the range of 1 - 25 g/cm3. Most liquids have densities between 0.5 - 5 g/mL, while the density of most gases under normal conditions of pressure and temperature is less than 5 g/L. The density of a substance is a valuable tool in determining the identity of a substance.
The laboratory techniques which you will perform are provided as two exercises, each of which you should be able to complete in 30 - 45 minutes. It is not necessary that you do the two exercises in order as they appear in the laboratory manual, but you must complete both exercises during the laboratory period.
NOTE: Each experiment for CHEM 1411 is written for students to work with one, two, or three partners. This experiment requires groups of three or four. Please do not work alone unless otherwise instructed.
You will record your measurements and results in the Data Tables as Trial 1. Your lab partners’ measurements and results are recorded as Trials 2, 3, and 4.
In Exercise 1, you will determine the density of a solid of regular geometric shape, and identify the composition of the solid by comparing the density with reported values. In Exercise 2, you will determine the density of pennies by water displacement.
B. Procedures
Exercise 1. Density of A Regular Solid
Apparatus: Electronic balances, beakers, regular-shaped solids, vernier calipers
Safety Equipment: aprons, goggles
Chemicals: None
Objectives: In this exercise you will:
1. learn to operate the electronic balance properly to measure the mass of an object.
2.
A. Overview
Review Sections 1.4 - 1.6 in your textbook (Chemistry: The Central Science, 9th Ed. , Brown, LeMay, Bursten, & Burdge)
This experiment will introduce you to a very important concept in science, especially chemistry: DENSITY. Density is the relationship between the mass of an object and the volume which it occupies. Solid substances generally have the greatest density, normally in the range of 1 - 25 g/cm3. Most liquids have densities between 0.5 - 5 g/mL, while the density of most gases under normal conditions of pressure and temperature is less than 5 g/L. The density of a substance is a valuable tool in determining the identity of a substance.
The laboratory techniques which you will perform are provided as two exercises, each of which you should be able to complete in 30 - 45 minutes. It is not necessary that you do the two exercises in order as they appear in the laboratory manual, but you must complete both exercises during the laboratory period.
NOTE: Each experiment for CHEM 1411 is written for students to work with one, two, or three partners. This experiment requires groups of three or four. Please do not work alone unless otherwise instructed.
You will record your measurements and results in the Data Tables as Trial 1. Your lab partners’ measurements and results are recorded as Trials 2, 3, and 4.
In Exercise 1, you will determine the density of a solid of regular geometric shape, and identify the composition of the solid by comparing the density with reported values. In Exercise 2, you will determine the density of pennies by water displacement.
B. Procedures
Exercise 1. Density of A Regular Solid
Apparatus: Electronic balances, beakers, regular-shaped solids, vernier calipers
Safety Equipment: aprons, goggles
Chemicals: None
Objectives: In this exercise you will:
1. learn to operate the electronic balance properly to measure the mass of an object.
2.