Purpose: This lab has four purposes. They are:
· Become familiar with the differences between physical and chemical properties.· learn to safely light, adjust, use and shut down a Terrill Burner.
· correctly and safely follow the instructions and procedures.
· take the data from the fireworks lab, analyze it and create conclusions.
Physical and Chemical Properties: (Note: Not Physical and Chemical CHANGES!)
Physical Properties can be seen or measured without changing the identity of that substance. Knowing physical properties allows you to identify a substance by its characteristic properties. Some examples of physical properties are: State of matter, color, taste, hardness, crystal shape, melting or boiling temperature, etc
Chemical Properties are characteristics involved in a transformation from one substance to another, including burning. Knowing chemical properties allows you to predict how a substance will react with other substances and what substances will be produced by the reaction. For example, by knowing the color of Lithium when it is burned, one can identify when Lithium is in an unknown sample being burned.
In this lab we are going to observe one physical and one chemical property of different types of matter used to produce Fireworks
Imagine a hot summer Fourth of July evening. Barbecues are wafting the smell of mouth-watering food to your nose and children are playing happily in the fading twilight. Suddenly, you hear a gigantic explosion high above your head! You look up just in time to see showers of brilliant reds, glittering golds, deep greens, and bright whites splashed across the sky. It looks like a painter went wild, throwing their paints high into the atmosphere. While staring up at the sky in wonder, the scientist within you asks, "What are some physical and chemical properties of the elements that produce fireworks??"
- Today's lab will gather information about the color of crystals of different elements, their color when burned, and compare the color of the element's crystal (physical property) to that of its flame color (chemical property).
- Later, students will identify different elements by their flame colors
Answer these questions in complete, quality and correct sentences on a separate sheet of paper. (Total 300 pts)
Part 1: (105 pt) Pre Lab: Use the information above to create the following (Use proper format):
1. (5 pt) Tell the Study Subject
2. (5 pt) Describe the Manipulated Variable:
3. (5 pt) Explain what is the Responding Variable:
4. a. (5 pt) Describe the Control Trial
b. (5 pt) Tell which are the Experimental Trials.5. (10 pt) Question:
6. (10 pt) Prediction:
7. (10 pt) Hypothesis:
8. (10 pt) Safety Check One: List the four steps you take if an acid spills on you.
9. (10 pt) Safety Check Two: List the four steps you take in case of an uncontrolled fire in class.
10. Use a Periodic Table of the Elements to determine:
a. (10 pt) The number of protons in the following elements. Co, Na, Li, Cu, Clb. (10 pt) The atomic mass of the following elements. Co, Na, Li, Cu, Cl
c. (10 pt) The name of the following elements. Co, Na, Li, Cu, Cl
Part 2: Analysis Questions (95 pts) = (45 pt) Data Table (50 pt)
Copy the Data Table, Watch the Demonstration and take initial Data. Then safely perform the lab. Afterwards CQC your Data Table and answer the following questions 11. (10 pt) Tell one Controlled Variable in the experiment and tell why it was controlled.
12. (10 pt) Tell One Uncontrolled Variable in the experiment and tell how it could have effected the experiment.
13. (10 pt) Explain if burning an element's crystals demonstrates a physical or chemical property AND tell why this is so
14. (15 pt) Use the Matter, Atoms, Molecules, & Fireworks packet and personal knowledge to completely explain why the burning elements in this lab emit colored light. This link will help too!
15. (50 pt) Create a CQC Data Table 1: Flame Lab: Crystal Color vs Flame Color showing your lab team's results.
Part 3 Conclusion and Extention (100 pts) = Conclusion (70 pt) Questions (30 pt)
16. (70 pt) Conclusion: Ensure you use the checklist below to write your conclusion.
a. (5 pt) _____ State the Questionb. (5 pt) _____ Restate the Hypothesis
c. (5 pt) _____ Tell if the Hypothesis was accepted or rejected
d. (20 pt) _____ Use data to Tell Why the hypothesis was accepted or rejected.
i. _____ Use actual sample data from the experiment to show differences with, or agreement with the hypothesisii. _____ Be sure to use all chemicals tested as evidence.
e. (10 pt) _____ Tell if the data was reliable and why you believe this to be so.
f. (10 pt) _____ Explain how to do another, similar experiment, that would improve the Validity of this experiment.
g. (15 pt) _____ Summarize what you have learned in this experiment using at least 4 on task sentences.
Element Atomic Symbol Element's Crystal Color Element's Flame color (when being burned) Al Sb Ba Mg K St Sn Ti Zn Scenario: You are a forensic pathologist (CSI anyone?) who was given 8 samples from a crime scene. They are all sort of whitish. You perform a flame test and get the following results.
Sample A - Green glittery flame with smoke
Sample B - Sparking bright pinkish with flames
Sample C - Silver blue sparking
Sample D - Persistant yellow violet17. Use Data Table Two above AND your data in Data Table One from the Flame Lab experiment to Identify the elements in the four samples above. If in doubt refer to the Atoms, Molecules, and Fireworks HO
Sample A = (5 pt)Sample B =( 5 pt)
Sample C = (5 pt)
Sample D = (5 pt)
18. (10 pt) Your job is to create a spectacular patriotic fireworks display for New Year's Eve.
The project specifications call for a glittering red, white, and blue display with silver sparks.Explain what you will pack in your fireworks to make this happen. (Remember the fire triangle when answering this question!!)
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