Day 32 4.3 Chemical Properties

1. Day 32 4.3 Chemical Properties

2. Chemical Property is the ability of a substance to change (react) and form new substances

3. Reactions • We will examine four examples of reactivity

4. Reactions • We will examine four examples of reactivity 1) Reactivity with Water:

5. Reactions • We will examine four examples of reactivity 1) Reactivity with Water: Calcium Carbide is a __________ that reacts with water to generate acetylene gas.

7. Reactions • We will examine four examples of reactivity 1) Reactivity with Water: Calcium Carbide is a __________ that reacts with water to generate acetylene gas. The acetylene gas is combustible, which makes it useful for generating light (used by cavers deep underground)

8. 2) Reactivity with Oxygen: Aluminum metal is very reactive with oxygen.

9. 2) Reactivity with Oxygen: Aluminum metal is very reactive with oxygen. The reaction causes a layer of aluminum oxide to form on the surface of the aluminum, which protects the metal from weathering.

11. 2) Reactivity with Oxygen: Aluminum metal is very reactive with oxygen. The reaction causes a layer of aluminum oxide to form on the surface of the aluminum, which protects the metal from weathering.This helps aluminum objects from corroding.

12. 3) Reactivity with Acids: Baking soda is a compound that reacts with acids to create carbon dioxide gas.

13. 3) Reactivity with Acids: Baking soda is a compound that reacts with acids to create carbon dioxide gas. Many recipes for baked goods use baking soda because the bubbles of carbon dioxide that form to make better dough rise.

14. 4) Reactivity with Another Pure Substance: Knowing how pure substances react with each other provides the basis that enables chemists to develop new products.

15. Combustibility:

16. Combustibility: The ability of a substance to burn in air

17. In class Work • Q 1- 4, page 163 • Describe the following on page 164Stability and toxicity