PHYSICAL AND CHEMICAL PROPERTIES AND CHANGES

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Brittany Tate
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1 PHYSICAL AND CHEMICAL PROPERTIES AND CHANGES Name Key PHYSICAL PROPERTY CHEMICAL PROPERTY 1. observed with senses 1. indicates how a substance 2. determined without destroying matter reacts with something else 2. matter will be changed into a new substance after the reaction Identify the following as a chemical (C) or physical property (P): 1. blue color 2. density 3. flammability (burns) 4. solubility (dissolves) 5. reacts with acid 6. supports combustion 7. sour taste 8. melting point 9. reacts with water 10. hardness 11. boiling point 12. luster 13. odor 14. reacts with air PHYSICAL CHANGE CHEMICAL CHANGE 1. a change in size, shape, or state 1. a change in the physical and 2. no new substance is formed chemical properties 2. a new substance is formed Identify the following as physical (P) or chemical (C) changes. 1. NaCl (Table Salt) dissolves in water. 2. Ag (Silver) tarnishes. 3. An apple is cut. 4. Heat changes H 2 O to steam. 5. Baking soda reacts to vinger. 6. Fe (Iron) rusts. 7. Alcohol evaporates. 8. Ice melts. Physical and Chemical Changes 9. Milk sours. 10. Sugar dissolves in water. 11. Wood rots. 12. Pancakes cook. 13. Grass grows. 14. A tire is inflated. 15. Food is digested. 16. Paper towel absorbs water. Part A Can you recognize the chemical and physical changes that happen all around us? If you change the way something looks, but haven t made a new substance, a physical change (P) has occurred. If the substance has been changes into another substance, a chemical change (C) has occurred. 1. An ice cube is placed in the sun. Later there is a puddle of water. Later still the puddle is gone. 2. Two chemical are mixed together and a gas is produce. 3. A bicycle changes color as it rusts. 4. A solid is crushed to a powder. 5. Two substances are mixed and light is produced. 6. A piece of ice melts and reacts with sodium. 7. Mixing salt and pepper. 8. Chocolate syrup is dissolved in milk. 9. A marshmallow is toasted over a campfire. 10. A marshmallow is cut in half.

2 Part B Read each scenario. Decide whether a physical or chemical change has occurred and give evidence for your decision. The first one has been done for you to use as an example Scenario Umm! A student removes a loaf of bread hot from the oven. The student cuts a slice off the loaf and spreads butter on it. Your friend decides to toast a piece of bread, but leaves it in the toaster too long. The bread is black and the kitchen if full of smoke. You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it. Physical or Chemical Change? Evidence 4. You blow dry your wet hair In baking biscuits and other quick breads, the baking powder reacts to release carbon dioxide bubbles. The carbon dioxide bubbles cause the dough to rise. You take out your best silver spoons and notice that they are very dull and have some black spots. A straight piece of wire is coiled to form a spring Food color is dropped into water to give it color. Chewing food to break it down into smaller particles represents a change, but the changing of starch into sugars by enzymes in the digestive system represents a change. In a fireworks show, the fireworks explode giving off heat and light. Part C: True (T) or False (F) 1. Changing the size and shapes of pieces of wood would be a chemical change. 2. In a physical change, the makeup of matter is changed. 3. Evaporation occurs when liquid water changes into a gas. 4. Evaporation is a physical change. 5. Burning wood is a physical change. 6. Combining hydrogen and oxygen to make water is a physical change. 7. Breaking up concrete is a physical change. 8. Sand being washed out to sea from the beach is a chemical change. 9. When ice cream melts, a chemical change occurs. 10. Acid rain damaging a marble statue is a physical change.

First, use the book to define the following terms.

3 WORKSHEET ON CHEMICAL VS PHYSICAL PROPERTIES AND CHANGES Keep this in your binder as a study guide! You will have a quiz on this next class! Background: Keeping the difference between physical and chemical properties as well as changes can be a challenge! This worksheet will help you do this. First, use the book to define the following terms. VOCABULARY WORD DEFINITION Physical Property Physical Change Change in which the identity of the substance does NOT change Chemical Property Chemical Change Part One: Physical or Chemical Property? Fill in the chart using the vocabulary words or phrases provided. Vocabulary words Boiling point Ability to rust Melting point Brittleness Reactivity with vinegar elasticity Flammability Density Transparency ductility Each word is used once. Define the word when done! Chemical Property Definition The ability to burn Reacts with oxygen to produce rust Physical Property Definition The property of letting light pass through something Part Two: Physical or Chemical Change? Indicate with a P or a C which type of change is taking place. 1. glass breaking 10. mixing salt and water 2. hammering wood together 11. mixing oil and water 3. a rusting bicycle 12. water evaporating 4. melting butter 13. cutting grass 5. separate sand from gravel 14. burning leaves 6. bleaching your hair 15. fireworks exploding 7. frying an egg 16. cutting your hair 8. squeeze oranges for juice 17. crushing a can 9. melting ice 18. boiling water

8 Examples of Exothermic and Endothermic Processes

9 Name: Date: Balancing Chemical Equations Balance the following chemical equations. 1. Fe + H 2 S0 4 Fe 2 (SO 4 ) 3 + H 2 2. CH 4 + O 2 CO 2 + H 2 O 3. SiCl 4 (l) + H 2 O(l) SiO 2 (s) + HCl(aq) 4. AgI + Na 2 S Ag 2 S + NaI 5. NH 3 + O 2 NO + H 2 O 6. FeO 3 (s) + CO(g) Fe(l) + CO 2 (g) 7. SiO 2 + HF SiF 4 + H 2 O 8. NaBr + Cl 2 NaCl + Br 2 9. (NH 4 ) 3 PO 4 + Pb(NO 3 ) 4 Pb 3 (PO 4 ) 4 + NH 4 NO Mg(OH) 2 + HCl MgCl 2 + H 2 O sciencenotes.org

10 Name: Date: Balancing Chemical Equations Balance the following chemical equations. 1. KOH + H 3 PO 4 K 3 PO 4 + H 2 O 2. NH 3 + O 2 NO + H 2 O 3. Al + O 2 Al 2 O 3 4. CaS + H 2 O Ca(HS) 2 + Ca(OH) 2 5. Au 2 S 3 + H 2 Au + H 2 S 6. PCl 5 + H 2 O H 3 PO 4 + HCl 7. Ba 3 N 2 + HF BaF 2 + NH 3 8. CaCl 2 + Na 3 PO 4 Ca 3 (PO 4 ) 2 + NaCl 9. FeS + O 2 Fe 2 O 3 + SO HClO 4 + P 4 O 10 H 3 PO 4 + Cl 2 O 7 sciencenotes.org

11 Name: Date: Balancing Chemical Equations Balance the following chemical equations Fe + 3 H 2 S0 4 1 Fe 2 (SO 4 ) H CH O 2 1 CO H 2 O 3. 1 SiCl 4 (l) + 2 H 2 O(l) 1 SiO 2 (s) + 4 HCl(aq) 4. 2 AgI + 1 Na 2 S 1 Ag 2 S + 2 NaI 5. 4 NH O 2 4 NO + 6 H 2 O 6. 1 FeO 3 (s) + 3 CO(g) 1 Fe(l) + 3 CO 2 (g) 7. 1 SiO HF 1 SiF H 2 O 8. 2 NaBr + 1 Cl 2 2 NaCl + 1 Br (NH 4 ) 3 PO Pb(NO 3 ) 4 1 Pb 3 (PO 4 ) NH 4 NO Mg(OH) HCl 1 MgCl H 2 O sciencenotes.org

13 Types of Chemical Reactions Examples of Combinations reactions Examples of Decomposition reactions

14 Examples of Single Displacement reactions Examples of Double Displacement reactions

Chemistry 11. Book 1: The Nature of Matter

Chemistry 11. Book 1: The Nature of Matter Chemistry 11 Book 1: The Nature of Matter Name: Block: Properties of Matter Classifying Material Properties is the science concerned with the properties, composition, and behaviour of matter. is anything