IonsLabReport

3. Double click on another test tube from the box. Click on the bottle of Pb 2+ solution on the shelf to add it to the test tube. Drag the tube to the blue rack. Repeat this process and create test tubes containing Fe 3+ (not Fe 2+ ), Cu 2+ , Pb 2+ (again), and Ag + (again). 4. You can observe color changes that occur in the test tube and see the changes in chemical formulas in Live Data. Hover over the first test tube on the left. Observe that the solution is clear and colorless in the window and that the display shows Ag + . 5. Drag the first test tube ( Ag + ) from the blue test tube rack to the metal clamp on the stand on the lab bench and click the bottle labeled NaCl on the lab bench. Notice the changes in the test tube and in the screen. The solution changes from colorless to white and the display shows AgCl. In this compound the ratio of Ag to Cl is 1:1. Record the formula, the color before reaction, the color after reaction, and the ratio in the first row of the table below. Drag the test tube to the red disposal bucket. 6. Drag the second test tube ( Pb 2+ ) from the blue rack to the metal stand and click the bottle labeled NaCl . What changes do you observe in the test tube and in the display? Record the color before, the color after, and the ratio in the second row of the table. Drag the test tube to the red disposal bucket. 7. Drag the third test tube ( Fe 3+ ) from the blue rack to the metal stand but this time click the bottle labeled Na 2 S . Record the color before, the color after, and the ratio in the table below. Drag the test tube to the red disposal bucket. Repeat for the fourth ( Cu 2+ ) and fifth ( Pb 2+ ) test tubes adding Na 2 S in each case. Record the color before, the color after, and the ratio in the table below. Drag the test tubes to the red disposal bucket. When entering subscripts and superscripts you will use "_" and "^" respectively. For example, A b C is entered as A_b^c Test Tube Formula from Screen Color Before Color After Ratio 1- Ag + AgCl Clear White 1:1 2- Pb 2+ PbCl_2 Clear White 1:2 3- Fe 3+ FeS Yellow Black 1:1 4- Cu 2+ CuS Blue Black 1:1 5- Pb 2+ PbS Clear Black 1:1