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Acceleration Of Gravity
Cycles of water
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Acids by Evette Taylor
At the simplest definition, an acid is any compound that yields hydrogen ions (H+) or hydronium ions (H3O+) when dissolved in water. Hydronium ions are really the combination of H+ ions and H2O molecules, i.e.
H+ + H2O === H3O+.
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Properties of Acids
taste sour (don't taste them!)... the word 'acid' comes from the Latin
, which means 'sour'
acids change litmus (a blue vegetable dye) from blue to red
their aqueous (water) solutions conduct electric current (are electrolytes)
react with bases to form salts and water
evolve hydrogen gas (H2) upon reaction with an active metal (such as alkali metals, alkaline earth metals, zinc, aluminum)
Examples of Common Acids
citric acid (from certain fruits and veggies, notably citrus fruits)
ascorbic acid (
, as from certain fruits)
carbonic acid (for carbonation of soft drinks)
lactic acid (in buttermilk
Beiser, A. (1988).
Physical Science (2nd Edition)
. New York, NY: McGraw Hill
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Acids and Bases Definitions
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Anne Marie Helmenstine, Ph.D.
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