chem lab 3

Physical and Chemical Properties
Peter Jeschofnig, Ph.D.
Version 42-0188-00-01

Lab RepoRt assistant

This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

Solubility or Reaction
Substance
Name
Color
Odor
Effect
of Heat
Cold
H2O
Hot
H2O
Litmus
Test
Dilute
HCl
Dilute
NaOH
Mg
silver none none none none basic Bubbled none Cu copper none
Color change none none none none none Zn silver none none none none none bubbled none
MgO
white none none dissolve separates basic mixes milky CuCO3 green none black dissolve separates acidic mixes blue
Cu(NO3)2
blue none melt dissolve dissolve acidic Mix/green none NaCl white none
Sizzle
dissolve popping none none none

Questions

Did you observer any chemical changes in this experiment?
Yes

What evidence did you use to decide that something was a chemical change?
I observed during the application of the hydrochloric acid to some of the substances bubbling, and smoking

Give at least two examples of chemical changes you observed.
Green changed from blue to application of HCL to Mg smoking and bubbling and CuCO3

Classify the following properties of sodium metal as physical or chemical:

• Silver metallic color: Physical
• Turns gray in air: Chemical
• Melts at 98oC: Physical
•