H-17
Flame Test
Purpose: To demonstrate and classify the characteristics of a chemical reaction.
Objective:
Describe the difference between a physical and chemical change.
Data Table:
Chemical Compounds:
|
Elements Involved:
|
Characteristics:
|
Barium Chloride
| Ba | Yellow/Green |
Calcium Chloride
| Ca | Orange |
Lithium Chloride
| Li | Pink |
Potassium Chloride
| K | Violet |
Sodium Chloride
| Na | Regular fire |
Strontium Chloride
| Sr | Red Pinkish |
Unknown???
| (Aluminium foil) (Ba/Li) | yellow/orange w/ red |
Analysis Questions:
1.) What indicators (at least 3) determine that a chemical change (or reaction) has occurred?~ Color change, odor, & heat are few indicators of a chemical change2.) What is emitted when a chemical change takes place in the flame test?~Color change is emitted when a chemical change takes place a in flame test3.) What group, from the periodic table, do these elements exist?~Alkaline Earth Metal, Alkali Metals, Non Metal, Other Metals4.) Do any two elements give the same spectrum of color? Explain why?~Yes Na+Ca has the same orange color because they are a mix of alkali metal and alkaline earth metals5.) Recall what a catalyst is in a chemical reaction. What was the catalyst in these reactions?~Catalyst is something to cause reaction; The heat is the catalyst
Blog Requirements:
1.) Please write up the blog according the set up given in class (and in this presentation). *Answer all the questions listed in the section.
2.) One video of someone performing a flame test (no more than 1 minute).
3.) One picture explaining the colors given off by certain elements.
4.) Completely answer the critical thinking question with examples and explanations. *Include sources.
