Course Code: CHE026L Laboratory Activity Sheet #5 Name: Section: Schedule: Group number: Date:________________ ACTIVITY NO. 5 PHYSICAL & CHEMICAL PROPERTIES OF MATTER Learning objectives: To be able To be able To be able To be able to to to to list examples of physical and chemical properties. differentiate the physical and chemical properties of matter. discuss what happens to matter during physical and chemical changes. know the difference between intensive and extensive properties. Discussion: The physical properties of a substance are observed and measured without changing its composition. These properties are used to identify and describe substances. These physical properties may include odor, color, density, solubility, boiling point and melting point. Every substance also has chemical properties. These are only observed once a substance undergoes a change in composition - a chemical reaction. Procedures: A. Ductility 1. Uncoil 1 piece of a paper clip and observe. 2. Bend 1 piece of the iron nail using your hands only, and observe. 3. Take a picture of your work after performing procedures 1 and 2. B. Malleability 1. Fold into half a tin foil that is 4-inch by 4-inch in size, and observe. 2. Repeat the same procedure on a piece of paper of the same size. 3. Take a picture of your work after performing procedures 1 and 2. C. Boiling point 1. Pour 100mL water into a beaker, place it on top of a hot plate, and heat to boiling. 2. Place a thermometer in the beaker and read the temperature. 3. Repeat the same procedure. This time, use 85% sugar solution. Read the temperature. D. Deliquescence, Efflorescence and Hygroscopicity 1. Place 2.0 g sodium chloride, 1.0 g copper sulfate and 2.0 g sugar in three separate watch glasses. 2. Leave the three substances for 20 minutes and observe. 3. Take a picture of your work. E. Electrical Conductivity 1. Attach 1 AA battery with copper wires on both ends using masking tape. 2. Put the end of the copper wires in a beaker and pour 4ml water. Place a light bulb just above the water, with the bottom of the portion of the bulb partially submerged in the water. Observe and take a picture of your work. 3. Repeat procedures 1 and 2, changing water with vinegar. This document is the property of PHINMA EDUCATION Course Code: CHE026L Laboratory Activity Sheet #5 F. Formation of Bubbles 1. Weigh 3.0 grams of baking soda and place it inside a beaker. 2. Tilt the beaker to a 45-degree angle and slowly pour 10.0mL vinegar onto the wall of the beaker. 3. Observe the reaction that takes place. 4. Take a picture of your work. G. Change in color 1. Place 2mL silver nitrate solution in a test tube and add 10 drops of sodium chloride solution. 2. Mix thoroughly using a stirring rod and observe. 3. Take a picture of your work. H. Exothermic reactions 1. Carefully measure 5mL of concentrated sulfuric acid and add to the 10mL of water in a beaker. 2. Observe the temperature of the beaker by touching its sides. This document is the property of PHINMA EDUCATION Course Code: CHE026L Laboratory Activity Sheet #5 Name: Section: Group Number: ________ Schedule: Date: _______________ ACTIVITY NO. 5 PHYSICAL & CHEMICAL PROPERTIES OF MATTER A. Ductility Paste a picture of your work. PAPER CLIP IRON NAIL Observation/s: B. Malleability Paste a picture of your work. TIN FOIL PAPER Observation/s: This document is the property of PHINMA EDUCATION Course Code: CHE026L Laboratory Activity Sheet #5 C. Boiling Point Paste a picture of your work. SUGAR SOLUTION WATER Boiling temperature of water: Boiling temperature of sugar solution: ___________________ ___________________ Observation/s: D. Deliquescence, Efflorescence and Hygroscopicity Paste a picture of your work. SODIUM CHLORIDE COPPER SULFATE Observation/s: This document is the property of PHINMA EDUCATION SUGAR Course Code: CHE026L Laboratory Activity Sheet #5 E. Electrical Conductivity Paste a picture of your work. WATER VINEGAR Observation/s: F. Formation of Bubbles: Paste a picture of your work. Observation/s: This document is the property of PHINMA EDUCATION Course Code: CHE026L Laboratory Activity Sheet #5 G. Change in color Paste a picture of your work. Observation/s: H. Exothermic reactions Paste a picture of your work. Observation/s: This document is the property of PHINMA EDUCATION Course Code: CHE026L Laboratory Activity Sheet #5 GUIDE QUESTIONS: 1. Differentiate the physical and chemical properties of matter. Give examples for each. 2. Explain the difference between extensive properties and intensive properties. Give examples for each. 3. Discuss what happens to matter when it undergoes physical and chemical changes. 4. Classify a. b. c. d. e. f. g. h. each of the following changes as physical or chemical: souring of milk: melting of gold: Iron forming rust: burning of gasoline: condensation of steam: dissolving of sugar in water: A rubber band stretches when you pull it: An antacid tablet fizzes when it comes in contact with stomach acid: This document is the property of PHINMA EDUCATION
