Chemical Reaction Report
II. LEARNING OBJECTIVES - To perform different types of chemical reactions including acid-base, precipitation, gas forming, complex compound forming and oxidation-reduction reactions. - To identify some of the products in these reactions and describe the chemical changes. - To write and balance the chemical equations for the reactions observed. III. EQUIPMENT AND REAGENTS 1. EQUIPMENTThirty test tubes One test tube rack Two test tube holders Two spatulas Three 250 mL beakers One stirring rodOne medicine dropper IV. EXPERIMENTAL PROCEDURE 1. REACTIONS OF Cu2 - Prepare 3 test tubes, 10 drops of 0.5 M CuSO4 are added into each one-10 drops of the following reagents are added into the tubes 2 M NaOH 2 M NH4OH 0.5 M K4Fe(CN)6. - Record your observations. 2. REACTIONS OF SILVER HALIDES - Prepare 3 test tubes, 10 drops of 0.5 M KCl, 0.5 M KBr, and 0.5 M KI are added into each one- Add 10 drops of 0.1 M AgNO3 to each salt solution. Record your observations. - Each test tubes are divided into 2 test tubes and labeled 1-3 A and 1-3 B - Test tubes 1-3 A 5 drops of 2 M NH4OH are added to each of test tubes. Observe the change. - Test tubes 1-3 B 5 drops of 2 M KCN are added to each of test tubes. Record your observations. 3. REACTIONS OF H2O2 - 5 drops of 0.1 M KMnO4 solution are added into a test tube. 5 drops of 2 M H2SO4 are added to acidify the solution and then add 5 drops 0f 3 H2O2 solution. Observe the color change and the release of gas. - 5 drops of 0.1 M KI solution are added into a test tube. 5 drops of 2 M H2SO4 are added to acidify the solution and then add 5 drops 0f 3 H2O2 solution KI - Have a pinch of solid MnO2 added into 1 mL of 3 H2O2 solution. Observe the released gas. 4. REACTIONS OF NITRATE BROWN RING TEST - Add 1 mL of 1 M NaNO3 to the test tube and then 1 mL of saturated FeSO4- Pour concentrated sulfuric acid (96) carefully into the test tube. After waiting for a few seconds,observe the change of color at the interface between