Chemical and Physical Changes Lab Report

Topics: Chemistry, Hydrochloric acid, Chlorine Pages: 3 (993 words) Published: September 12, 2014
Stazi Belvin
Chemical and Physical Lab Changes Lab Report
9/5/2014
I. Purpose-
The overall purpose of the lab is to identify chemical and physical changes. II. Safety-
To work with the chemicals used in the lab, it is required to wear safety goggles to protect your eyes from the fumes when working with the chemicals. It is also required to be cautious when working with the acids used in this lab because they can cause burning and irritation of the skin. Also, be cautious as to not inhale the chemicals. Because the glassware is glass, they may break and as such must be handled gently. All glassware should be inspected for cracks before starting the lab. III. Pre-Lab Questions-

1. Identify the following as either chemical or physical changes: A. Striking a match- Chemical
B. Food Spoiling- Chemical
C. Breaking a Glass- Physical
D. Mowing the Grass- Physical
E. Leaves Decaying- Chemical
F. Boiling Water- Physical
2. In your own words, state the Law of Conservation of Mass: The Law of the Conservation of Matter says the matter can be neither created nor destroyed. 3. List the indicators of a chemical change:

Chemical change can be illustrated in many forms such as rust, decay, light being produced, heat being given off or cold being given off, and color change. These are simply a few and are not all of them. 4. Identify each as an element, compound, or mixture:

A. Air- Compound
B. Sulfur- Element
C. Hydrogen Gas- Element
D. Salad- Mixture
E. Water- Compound
F. Sodium Bicarbonate- Compound
G. Fruit Punch- Compound
H. Sodium Chloride (table salt)- Compound
IV. Procedure-
Experiment 1-
Combine a few iron filings along with sulfur powder on an unused piece of paper. Mix the samples well with a scoopula. Examine the mixture with a magnifying glass and record your observation. Next, move the magnet under the mixture and reexamine it with a magnifying glass once again and record the observations. Discard the sample. Experiment 2- Fill a small...
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