Ch. 2 : “Chemistry of Life”

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Presentation transcript:

Ch. 2 : “Chemistry of Life” Active Reading: “Water & Solutions”

SKILL: RECOGNIZING CAUSE AND EFFECT 1. What Key Terms are contained in this passage? How do you know the word(s) are Key Terms? The key terms are acids and bases because they appear in boldface type. 2. Define each Key Term. Acids are compounds that form hydrogen ions when dissolved in water. Bases are compounds that reduce the concentration of hydrogen ions in a solution. 3. A cause-and-effect relationship is identified in Sentence 2. What is the effect of adding an acid to water? The concentration of hydrogen ions in the solution is increased above that of pure water.

SKILL: RECOGNIZING SIMILARITIES AND DIFFERENCES 4. A Venn diagram: a. In the left oval, list the key traits of acids. form hydrogen ions when dissolved in water; have pH values below 7 b. In the right oval, list the key traits of bases. form hydroxide ions when dissolved in water; have pH values above 7 c. In the area formed by the overlapping ovals, list traits shared by both acids and bases. water-soluble compounds

Multiple Choice 5. Which of the following pH values indicate a slightly acidic solution? a. 3 b. 6.5 c. 9 d. 11 b