1. Unit 2: Chemical Interactions Chapter 7: Acids, Bases, & Solutions Big Idea: Acids taste sour, turn blue litmus paper red, & produce hydrogen ions (H + ) in water. Bases taste bitter, turn red litmus paper blue, & produce hydroxide ions (OH - ) in water

2. Mrs. Lee - Ch 72 4 Sections 1.Understanding Solutions 2.Concentration & Solubility 3.Describing Acids & Bases 4.Acids & Bases in Solution

3. Mrs. Lee - Ch 73 Sec 1: Understanding Solutions KEY CONCEPTS A solution has the same properties throughout. It contains solute particles that are too small to see A colloid contains larger particles than a solution. The particles are still too small to be seen easily, but are large enough to scatter a light beam

4. Mrs. Lee - Ch 74 Sec 1: Understanding Solutions (cont’d) A suspension does not have the same properties throughout. It contains visible particles that are larger than the particles in solutions or colloids When a solution forms, particles of the solvent surround & separate the particles of the solute Solutes lower the freezing point & raise the boiling point of a solvent

5. Mrs. Lee - Ch 75 Sec 1: Key Terms Solution Solvent Solute Colloid Suspension

6. Mrs. Lee - Ch 76 Sec 2: Concentration & Solubility KEY CONCEPTS To measure concentration, you compare the amount of solute to the amount of solvent or to the total amount of solution You can identify a substance by its solubility because it is a characteristic property of matter Factors that affect the solubility of a substance include pressure, the type of solvent, & temperature

7. Mrs. Lee - Ch 77 Sec 2: Key Terms Dilute solution Concentrated solution Solubility Saturated solution Unsaturated solution Supersaturated solution

8. Mrs. Lee - Ch 78 Sec 3: Describing Acids & Bases KEY CONCEPTS An acid tastes sour, reacts with metals & carbonates, & turns blue litmus paper red A base tastes bitter, feels slippery, & turns red litmus paper blue Acids & bases have many uses around the home & in industry

9. Mrs. Lee - Ch 79 Sec 3: Key Terms Acid Corrosive Indicator Base

10. Mrs. Lee - Ch 710 Sec 4: Acids & Bases in Solution KEY CONCEPTS An acid produces hydrogen ions (H + ) in water A base produces hydroxide ions (OH - ) in water A low pH tells you that the concentration of hydrogen ions is high. In contrast, a high pH tells you that the concentration of hydrogen ions is low In a neutralization reaction, an acid reacts with a base to produce a salt & water

11. Mrs. Lee - Ch 711 Sec 4: Key Terms Hydrogen ion (H + ) Hydroxide ion (OH - ) pH scale Neutral Neutralization Salt