CHEM 1030L - Chemical and Physical Changes
Name:
______________
Date: ____________
Laboratory Report
Section: ______________
Lab Sta. #: ________
PURPOSE
Instructions: Using 2-4 complete sentences written in third person with proper grammar and punctuation, briefly summarize the purpose of
this laboratory exercise. Include the learning objectives and the major outcomes.
Write the purpose of this Lab Exercise here…
Data and Observations
Hint: ALWAYS include units of measurement and the correct number of sig. figs.
Part A: Combustion of Magnesium
Appearance of magnesium strip
Observation of reaction
Appearance of product
Balanced chemical equation
Hint: Include phase labels.
Did the magnesium undergo a
chemical or physical change?
Part B: Sublimation of Iodine
Appearance of iodine crystals
before heating
Observations during heating
Observations after heating
Balanced chemical equation
Hint: Include phase labels.
Did the iodine undergo a
chemical or physical change?
Part C: Reaction of Copper and Silver Nitrate
Appearance of copper wire
Appearance of silver nitrate
solution
Observation of reaction after five
minutes
Observation of reaction at the
end of lab period.
Balanced chemical equation
Did the copper undergo a
chemical or physical change?
Hint: Include phase labels.
Part D: Reaction of Metals with Acid
Reaction of Copper with Acid
Initial appearance of copper
metal
Appearance of copper in HCl
(evidence of chemical reaction)
Did a chemical reaction take
place?
Answer yes or no.
? Reminder: If no reaction takes
place, the products are written
as "NR" (no reaction).
Balanced chemical equation
Reaction of Zinc with Acid
Initial appearance of zinc metal
Appearance of zinc in HCl
(evidence of chemical reaction)
Did a chemical reaction take
place?
Answer yes or no.
Reminder: If no reaction takes
place, the products are written
as "NR" (no reaction).
Balanced chemical equation
Reaction of Magnesium with Acid
Initial appearance of magnesium
metal
Appearance of magnesium in HCl
(evidence of chemical reaction)
Did a chemical reaction take
place?
Answer yes or no.
Reminder: If no reaction takes
place, the products are written
as "NR" (no reaction).
Balanced chemical equation
Part E: Endothermic and Exothermic Reactions
NH4NO3
CaCl2
Initial Temperature
Final Temperature
Change in Temperature
Hint: Change = Final – Initial
Was the change endothermic or
exothermic?
Balanced chemical equation for
NH4NO3
Balanced chemical equation for
CaCl2
Hint: Include phase labels.
Hint: Include phase labels.
QUESTIONS AND ANALYSIS
INSTRUCTIONS: Using one or more complete sentences written in third person with proper grammar and punctuation, briefly respond to the
following questions.
Hint: Remember that points are awarded for each aspect of the question.
1.
Which of the reactions in these lab activities involved a physical change? For each change, describe the evidence
that supports it being a chemical change.
Type the response here...
2.
Which of the reactions in these lab activities involved a chemical change? For each change, describe the evidence
that supports it being a chemical change.
Type the response here...
3.
Explain how a balanced chemical equation is related to the law of conservation of mass.
Type the response here...
4.
Consider the balanced chemical equation shown in Part C: Reaction of Copper and Silver Nitrate. For each
chemical substance that appears as a product in the balanced chemical equation, what observation confirmed the
presence of that chemical substance?
Type the response here...
5.
Write a definition for sublimation.
Type the response here...
CONCLUSION
INSTRUCTIONS: Write an essay, using complete sentences written in third person with proper grammar and punctuation, to briefly
summarize (1) the purpose of this laboratory exercise, (2) the work performed, (3) any problems encountered and how they could affect the
results, and the deliverables.
Use paragraphs to separate major ideas, however, do not number the paragraphs.
Type the response here...