1. Bell-ringer: Draw This Triangle 1. An object has a mass of 468 g and a volume of 15 cm3. What is its density? 2. The density of an unknown mass is 3.5 g / cm3. It has a volume of 30 cm3. What is its mass? 3. The density of an unknown mass is 6.8 g / cm3. Its mass is 47 g. What is its volume ?

2. Physical versus Chemical Properties Chapter 5

3. Matter: anything that has mass and takes up space –Mass – the amount of matter in something –Volume – the amount of space something occupies Which of the following is matter? –A car? –A box? –You? Reviewing MATTER

4. What is a property? Property: a characteristic of a substance that can be observed

5. Physical Property Physical property: a property that can be observed using your senses without changing the identity of the substance. Examples: luster (shine) malleability: the ability to be hammered into a thin sheet ductility: the ability to be stretched into a wire melting point boiling point density solubility (how well it dissolves in water)

6. Special Physical Properties Melting point: the temperature at which a substance changes from a solid to a liquid at a given pressure water = 0 o C Boiling point: the temperature at which a substance changes from a liquid to a gas at a given pressure water = 100 o C

7. Chemical Properties Chemical property: a property that can only be observed by changing the identity of the substance. These properties usually describes how something reacts. Examples: flammability ability to rust reactivity with vinegar **These properties are hard to observe**

8. Density Density is the amount of mass per unit of volume. Density can be used to identify a substance. The density of water is 1.0g/mL

9. Calculate the Density (Use your Triangles) 1. A gold-colored ring has a mass of 18.9 grams and a volume of 1.12 mL. Is the ring pure gold? (The density of gold is 19.3 g/mL.) 2. What volume would a 0.871 gram sample of air occupy if the density of air is 1.29 g/L? 3. Pumice is volcanic rock that contains many trapped air bubbles. A 225 gram sample occupied 236.6 mL. What is the density of pumice? Will the pumice float on water?

10. Calculate the Density 4. A cup of sugar has a volume of 237 mL. What is the mass of the cup of sugar if the density is 1.59 g/mL? 5. Which has the greater mass, 1 liter of water or l liter of gasoline? The density of water is 1.00 g/mL and that of gasoline is appoximately 0.68 g/mL. 6. A crumpet recipe calls for 175 grams of flour. According to Julia Child's data, the density of flour is 0.620 g/mL. How many mL of flour are needed for this recipe?

11. Physical or Chemical 1. ( Physical or Chemical ) properties describe matter. 2. ( Physical or Chemical ) properties of a substance can be easily observed. 3. One can use their five senses to determine the ( Physical or Chemical ) properties of a substance. 4. ( Physical or Chemical ) properties usually describe how a substance reacts. 5. ( Physical or Chemical ) properties are not as easy to observe. 6. ( Physical or Chemical ) properties can be used to identify substances.

12. Physical or Chemical 7. Oxygen is odorless and colorless 8. Copper turns green when exposed to the environment 9. The piece of metal is magnetic 10. The density of water is 1.0 gram per cubic centimeter 11. Diamonds are a very hard substance 12. The tree is 8 meters high 13. Sodium reacts very easily with other elements. 14. Copper conducts electricity 15. Water is a liquid 16. The mass of the NaCl sample is 30 grams 17. Gold is nonflammable 18. Alka-Seltzer tablets react with water to produce gas 19. The color of the ball is red Matching Identify if the following are chemical or physical properties:

13. Physical or Chemical 20. Iron reacts with oxygen and forms rust 21. The boiling point of water is 100 degrees C 22. Baking soda reacts with vinegar 23. The gas is flammable 24. Oxygen is a gas 25. Argon is not very reactive 26. Nitrogen is a colorless gas 27. The silver spoons tarnished and turned dark 28. The piece of metal is magnetic 29. A student’s shirt suddenly bursts into flames. 30. Silver necklaces tarnish and turn green.

14. Draw this pH Scale

16. Properties of Acids Taste sour Corrosive (react with metals) Produce color changes with indicators Blue litmus paper turns red

17. Examples of common acids Acetic acid= vinegar

18. Acids Citric acid= citrus fruits

19. Acids Acetylsalicylic acid= aspirin

20. Acids Ascorbic acid= vitamin C

21. Acids Carbonic acid= carbonation

22. Acids Hydrochloric acid= stomach juices

23. Acids Sulfuric acid= car batteries

24. Properties of Bases Bitter taste Slippery to touch Red litmus paper turns blue

25. Examples of common bases Ammonia= household cleaner, fertilizer, production of nylon

26. Bases Aluminum hydroxide= deodorant, laxatives

27. Bases Sodium hydroxide= drain cleaner, soap making