Purpose: To observe the different characteristics of different types of reactions. Materials: steel wool CuSO4 * 5H2O Mg Zn Al CuSO4 (aq) CuCl2 (aq) KI (aq) Pb(NO3)2 (aq) BaCl2 (aq) Na2CO3 (aq) HCl (aq) Procedure: Part 1 1. Obtain a watch glass and mass it. 4. Place on watch 2. Place a sample of steel wool on glass, and re-mass. it and re-mass. 3. Using tongs, hold steel wool in the top area of a manly flame for 5 minutes. Part 2 1. Obtain a test tube and place about 1cm worth of CuSO4 (s) in it and mass. 2. Using a test tube holder, hold the TT horizontally and spread out the solid so covers ¾ of the TT. 3. Hold the TT in a manly flame for 4 minutes and observe. Be sure to move it back and forth and even flip it over carefully. 4. Let cool and re-mass. 5. Add a few drops of water and observe. 6. Dispose solid in trash. Part 3 1. Obtain 3 test tubes. 2. Put the following solutions in the its own test tube: a. 3ml CuSO4 b. 3ml HCl c. 3ml CuCl2 3. All at the same time put a piece of the following in the test tube: a. Mg b. Zn c. Al 4. Let them react for 3 minutes and observe 5. Let all sit until reaction is done and observe. Part 4 1. Obtain 2 test tubes. 2. In one test tube, add 3ml of KI (aq), In the other add 3ml of Pb(NO3)2 (aq) 3. Slowly pour the KI into the other TT and observe. 4. Repeat steps 1-3 with BaCl2 and Na2CO3 Part 1 Mass of watch glass ________g Mass of steel wool + glass Mass of steel wool Mass of product + glass Mass of product ________g ____________g ________g __________g Observations: Part 2 Mass of TT and CuSO4 (s) Mass of product + TT Observations: ______g _______g Part 3 Substance 3 min At end A B C Part 4 Reaction KI + Pb(NO3) BaCl2 + Na2CO3 Observations Lab Analysis Answer the following questions for each part in the lab. No need to write questions but use complete sentences in answers. Part 1 1. What evidence did you have for a chemical reaction. Why? 2. What type of reaction would you classify this as? 3. Write the balance chemical reaction. Part 2 1. What evidence was there that a chemical reaction occurred. Why? 2. How does the hydrate (water) affect the chemical? 3. What would you classify this reaction as? 4. Write the balanced chemical reaction. Part 3 1. What evidence did you have that a chemical reaction happened in each trial? 2. How would you classify each of these reactions? 3. Write the balanced equations for each trial. 4. Does your balanced equation help explain your observations better? Part 4 1. What evidence of a chemical reaction did you observe? 2. What would you call the solid particles that formed? 3. Write the balance equations for each trial. Conclusion lead in questions 1. What was done in this lab and what was being investigated. 2. What type of chemical reactions did you observe? 3. Which type of reaction did you find the most interesting? 4. Does seeing each reaction in action help understand how they work better?