acid and base are terms used by chemists to categorize chemicals according to their ph. an acid is...
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• Acid and base are terms used by chemists to categorize chemicals according to their pH.
•An acid is generally considered to be any material that gives up a hydrogen ion in solution.
• A base is any material that creates a hydroxide ion in solution.
•Many of these acids and bases are familiar in everyday life.
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A class of compounds whose water solutions taste sour, turn blue litmus to red, and react with bases to form salts.
(measures less than 7 on the pH scale)
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Acids produce solutions that:
• Taste sour
• Turn blue litmus paper red
• Conduct electricity
• react with metals to liberate a hydrogen gas
• are corrosive (acid rain)
• lose the above properties when reacted with a base.
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Examples of acids:
• Vinegar
• Lemon Juice
• Soft Drink
• Battery Acid
• Stomach Acid
• Apple Juice
• Black Tea
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A class of compounds that taste bitter, feel slippery in water solution, turn red litmus to blue, and react with
acids to form salts.
(measures more than 7 on the pH scale)
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Bases produce solutions that:
• taste bitter
• turn red litmus blue
• conduct electricity
• feel slippery
• are corrosive (basic solution in glass container)
• lose the above properties when reacted with an acid.
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Examples of bases:
• Detergent
• Baking Soda
• Drain Cleaner
• Ammonia
• Soaps (hand, dish)
• Antacid
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• These are items that are neither acids or bases.
• Neutral items will turn blue and red litmus paper green.
• The main example of a neutral item is: Pure Water
(measures exactly 7 on the pH scale)
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• Red litmus paper
• Blue litmus paper
• pH
• Red Cabbage Juice
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•Robert Boyle discovered litmus paper
•certain plant extracts, such as litmus, can be used to distinguish acids from bases.
• blue and red litmus paper turn red when dipped in an acid
• red and blue litmus paper turn blue when exposed to a base
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• pH is the measure of acids or bases of a solution.• The pH scale is numbered from 1 to 14
• 1 through 6 being acids
• 7 is considered neutral
• 8 through 14 being bases
The pH scale is used to identify how strong acids and bases are.
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• red cabbage can be used as an acid/base indicator
• after boiling the red cabbage, pour a small amount of the juice into a small sample of a substance your checking
• the juice will turn blue if the substance is a base
• the juice will turn red if the substance is an acid
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• Proteins in your hair, nails, cell membranes, and other parts of you body consist of amino acids.
• Enzymes that catalyze reactions in your body are composed of amino acids.
• Hydrochloric acid is in your stomach to aid in the digestion of food.
• Organic bases are major components of DNA and products of the digestion of proteins.
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• ACID - A class of compounds whose water solutions taste sour, turn blue litmus to red, and react with bases to form salts. (measures less than 7 on the pH scale)
• BASE - A class of compounds that taste bitter, feel slippery in water solution, turn red litmus to blue, and react with acids to form salts. (measures more than 7 on the pH scale)
• NEUTRAL - These are items that are neither acids or bases. There are 4 main ways to determine if a substance is and acid or a base. They are: Red litmus paper, Blue litmus paper, pH, and Red Cabbage Juice.
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1. Name an example of an acid that was mentioned on one of the slides.
2. Name an example of a base that was mentioned on one of the slides.
3. True or False. The lower the pH number, the stronger the acidity.
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1. Vinegar, Lemon Juice, Soft Drink, Battery Acid, Stomach Acid, Apple Juice, or Black Tea.
2. Detergent, Baking Soda, Drain Cleaner, Ammonia, Soaps (hand, dish), or Antacid.
3. True
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• Background information on acids and bases. <http://educ.queensu.ca/~science/main/concept/chem/c10/C10CDMJ1.htm>
• Acids and Bases. <http://www.bookrags.com/research/acids-and-bases-woc/>
• Acids and bases Lab. <http://www. Scribd.com/doc/2977162/Acids-and-Bases-Lab/>
• Smoot, Robert C.; Price, Jack S.; Smith, Richard G. Chemistry A Modern Course. Chapter 24, Acids, Bases, and Salts.
• Holt, Rinehart, and Winston, Inc. Chemistry Visualizing Matter. Chapter 13, Acids and Bases.
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