1. QOD# 52 How is the compound CO 2 (carbon dioxide) different from the elements, carbon and oxygen individually?

2. Mystery Compounds (add to TOC)

3. Objective: Identify compounds by observing properties. Materials: Flame Tweezers Paper towel 4 different mystery compounds

4. Procedures: 1.Get well plate with samples. 2.Use tweezers, pick up sample, hold in flame, observe, record. 3.End of tweezers will get HOT!! Wad up paper towel & wipe tweezers clean. 4.Repeat with other samples.

5. Flame Test - Key CuSO 4 – Copper Sulfate – bluish/green CuCl 2 – Copper Chloride – b luish/green (more reactive) NaCl – Sodium Chloride – orange CoCl 2 – Cobalt Chloride – sparkler

6. Data Table: Use chemical formula

7. Flame Test - Identification A - CuSO 4 – Copper Sulfate – bluish/green B - NaCl – Sodium Chloride – orange C - CoCl 2 – Cobalt Chloride – sparkler D - CuCl 2 – Copper Chloride – bluish/green (more reactive)

8. Questions 1.Which compounds did you guess correctly? 2.Which compound had the coolest effect? Why? 3.List the elements that are in each compound and the number of atoms of each element in one molecule of that compound. 4.Based on the flame test results and what elements are in the compounds, can you draw any conclusions about the elements in the compounds? (ex – which ones were blue?) 5.Were we testing for a chemical or physical property of the compounds? How do you know? 6.What safety precautions did we take for this lab? Why?