Chemistry, 21.10.2020 19:01 criser1987zach
Conservation of Mass Activity Worksheet
Instructions: Observe and analyze the interactions between the substances pictured in the slide show. Compare the properties of the substances before and after each interaction. You will submit your completed worksheet for grading.
Data Table
On the table below, record your observations before and after the interactions and explain how mass was conserved. Describe the changes in properties that prove a chemical reaction occurred. The first row is an example.
Observations Before Interaction
Observations After Interaction
How was mass conserved?
Proof of a Chemical Reaction
Example: Sugar + Heat:
Observations Before Interaction
The sugar is in tiny white particles in a pile. Heat is not seen but is implied by the heat source. The pile of sugar in the pot has a mass of 100 grams.
Observations After Interaction
There is a solid, light brown mass at the bottom of the pot. It has a mass of 100 grams.
How was mass conserved?
The mass of the sugar is the same in melted form as it is in solid crystal form.
Proof of a Chemical Reaction
There was not a chemical reaction. Sugar did not change the composition. It only melted. Melting point is a physical property, and this is a physical change.
Do This For
Steel Wool + Oxygen (Fire)
Egg + Heat
Water + Heat
Zinc + Hydrogen Chloride
Sodium Hydroxide + Copper Sulfate
Answers: 1
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Conservation of Mass Activity Worksheet
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