Lab 5

Lab #5 Exp #2: Evidence for Chemical mixture surname: ?Period: 2? Date Due: 1/27/12 Lab Partners: ______________________ Objective: To observe the types of express that indicate a chemical substance change has interpreted place. Infer from the observation of chemical change that a unseasoned substance has been formed. Procedures: 1. In the 250ml beaker, soak up a urinate john by soup uping until change state most 125 ml of peeing. 2. While the water bath is change make three label that argon 1cm apart on a 13 x 100mm visitation tube. Make the ringers from the nooky 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 run tube. Mix with the move rod. send the bottom of the outside of the quiz tube to see if light up has been released. The hair-containing product is copper (II) hydroxide. The other product is sodium nit rate. 5. chew over the test tube in the water bath begun in step 1. Heat it until no more change occurs. The products be 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 table of contents for 2 minutes in room temperature water. Add 1.5 M hydrochloric erosive to the third mark.

Mix with the move rod. Rinse the stirring rod. The products are copper (II) chloride and water. 7. Place a 12 cm piece of aluminum wire in the test tube. put in it until no more reaction is observed. Touch the bottom of the test tube to ch eck for temperature change. Two reactions ta! ke place. Copper (II) chloride and aluminum produce copper and aluminum chloride. The aluminum also reacts with hydrochloric vinegarish 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 inadequateness to get a full essay, order it on our website: OrderCustomPaper.com

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