Acids and Bases.

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Presentation transcript:

Acids and Bases

Acids release hydrogen ions (H+) when dissolved in water has a pH less than 7 tastes sour burns or stings turns pH indicators red

Penny in Nitric Acid (HNO3)

Penny in Nitric Acid (HNO3)

Bases release hydroxide ions (OH-) when dissolved in water has a pH greater than 7 tastes bitter feel slippery turns pH indicators blue

Acids and Bases neutralize each other when mixed buffers keep the pH of a solution from changing

pH Scale acids and bases are measured on the pH scale the scale ranges from 0 - 14 acid less than 7 base greater than 7 neutral 7 further from 7, stronger it gets

pH Scale

pH Scale orange juice (3.5) toothpaste (8.0) stomach acid (1.0) pure water (7.0) bleach (12.5) vinegar (2.5) hand soap (8.5) substance pH acid/base stomach acid 1 acid vinegar 2.5 orange juice 3.5 pure water 7 neutral toothpaste 8 base hand soap 8.5 bleach 12.5

Poem Lemons, sodas and battery acids These are examples of sour acids Bleach, Chalk and soap for faces These are examples of bitter bases