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825. Key concepts/skills: Level 1: Define key vocabulary. Level 2: Identify the basic properties of acids and bases and determine acid or base using litmus.

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Presentation on theme: "825. Key concepts/skills: Level 1: Define key vocabulary. Level 2: Identify the basic properties of acids and bases and determine acid or base using litmus."— Presentation transcript:

1 825

2 Key concepts/skills: Level 1: Define key vocabulary. Level 2: Identify the basic properties of acids and bases and determine acid or base using litmus paper. Level 3: Recognize the pH scale and the numerical relationship between the acids and the bases on the scale.

3 Key vocabulary Acids Bases Hydrogen ion Hydroxide ion pH scale Litmus Paper

4 I.Acids A.All solutions are either acid, bases or neutral. B.Acids- substances that release H+ ions when in solution. 1.Feel sticky and taste sour 2.Hydrogen ion H+ is what makes acids so corrosive and dangerous 3.H+ is an ion with no electrons/ will take electrons from any atom

5 C. Bases – substances that release hydroxide ions when in solution (alkaline) 1.Feel slippery and taste bitter 2.Hydroxide ions OH- is what makes bases corrosive or dangerous 3.OH- will give electron to any atom 4.Bases are good cleaners because they loosen dirt without damaging like acids 5.When acids and bases are combined, the OH- and the H+ combine to form a salt and H2O which is neutral

6 D. Litmus paper – used to determine whether a solution is acid or base 1. Blue litmus paper turns red for acid, no change not an acid 2. Red litmus paper turns blue for base, no change not a base 3. If neither paper changes solution is neutral

7 E. pH Scale – potential H+ ions 1.The pH scale quantifies the amount of H+ and OH- in any solution 2.Goes from 0 – is the acid end of the scale 4.7 is neutral 5.14 is the basic end of the scale 6.The scale is log-base 10 (this means that a 5 is ten times more acidic than a 6)

8 H + -HO

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