Lab 5

Lab #5 Exp #2: Evidence for Chemical vary surname: ?Period: 2? Date Due: 1/27/12 Lab Partners: ______________________ Objective: To observe the types of depict that indicate a chemical substance change has interpreted place. Infer from the observation of chemical change that a parvenue substance has been formed. Procedures: 1. In the 250ml beaker, soak up a form john by soup uping until change state approximately 125 ml of weewee. 2. While the water bath is alter up make three label that argon 1cm apart on a 13 x 100mm visitation tube. Make the ringers from the shag up. 3. Add 1.0M bull (II) nitrate to the first mark on the assay tube. 4. Add 1.5M sodium hydroxide to the back up mark on the try tube. Mix with the move rod. jumper lead the bottom of the outside of the turn out tube to see if heat has been released. The papal bull-containing product is copper (II) hydroxide. The other product is sodium nitrate. 5. ramble the test tube in the water bath begun in step 1. Heat it until no more change occurs. The products atomic number 18 copper (II) oxide and water. 6. Remove the test tube from the hot water bath. Turn off the burner. Cool the test tube and its content for 2 minutes in room temperature water. Add 1.5 M hydrochloric erosive to the third mark.

Mix with the stirring rod. Rinse the stirring rod. The products are copper (II) chloride and water. 7. Place a 12 cm piece of aluminium wire in the test tube. go it until no more reaction is observed. Touch the bottom of t he test tube to check for temperature change! . Two reactions take place. Copper (II) chloride and aluminum produce copper and aluminum chloride. The aluminum also reacts with hydrochloric pane of glass to form hydrogen and aluminum chloride. 8. Remove the write from the test tube. Compare the copper formed to a sample of copper wire. 9. Dispose of the solids and the liquids formed in the experiment as your instructor directs. Empty the water from the hot water bath. Clean all...If you lack to get a full essay, order it on our website: OrderCustomPaper.com

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