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9/12/24 
 Partner: Jeff Somvorachith 
 Lab 1. Physical and Chemical Changes Lab  
 Purpose: To identify physical and chemical changes through different experiments. 
 Procedure: 
 Experiment A 
 
 
 
 
 
 
 
 Dissolve a small amount of copper sulfate pentahydrate in water(no more than 1.2cm deep). 
 Holding the test tube with a test tube holder, strongly heat the mixture over a Bunsen burner flame. Make sure that the mouth is directed at a wall, away from other people.  
 Continue heating until a residue remains and the color changes. 
 Allow the substance to cool. 
 Add approximately 10ml of water to the test tube. 
 Pour the solution into the waste container provided. 
 
 
 
 
 
 
 
 Experiment B 
 
 
 
 
 
 
 
 Place a test tube into a test tube rack. 
 Place HCI into the test tube(~2cm deep of HCI). 
 place a 1.5cm piece of magnesium ribbon into the HCI. 
 Pour Mg/HCI waste into the container. 
 
 
 
 
 
 
 
 Experiment C 
 
 
 
 
 
 
 
 Dissolve a scoop of Epsom salts into 50ml of water in a 250ml beaker and stir to dissolve. 
 Add 3 droppers full of household ammonia. Do not drink. 
 Pour the solution down the drain. clean/dry the equipment.