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Understanding Acids and Bases in Chemistry

Learn about acids and bases, their properties, and uses in daily life. Explore the pH scale and how it measures the acidity or basicity of substances. Discover examples like stomach acid, ammonia, and Vitamin C. Engage in fun acid-base questions and homework activities!

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Understanding Acids and Bases in Chemistry

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  1. Acids and Bases

  2. What is an Acid • An acid is a compound that increases the number of hydrogen ions when dissolved in water. • Hydrogen Ion = H+ • For example when HCl (Hydrochloric ACID)is dissolved in water ….. • You will get H+ion and a Cl- ion. Why ?

  3. H+ Cl- • . H+ H+ Cl- H+ H+ Cl- Cl- H+ Cl- Cl- Cl- H+ H+ H+ ions will bond with H2O to form a molecule called Hydronium. The extraH+ions give a specific solution its acidic properties

  4. Acids in our lives • Ascorbic acid (Vitamin C) Anti Oxidant , Immune system ,antihistamine

  5. Carbonic acid H2CO3 When carbon dioxide dissolves in water producing carbonic acid: CO2 + H2O  H2CO3 Allows our Bodies to transport CO2 to our lungs

  6. From the Montreal Gazette 1985

  7. Stomach Acid (HCl) and Sulfuric Acid (H2So4)

  8. What is a Base • A base is any compound that increases the number of hydroxide ions (OH-) when mixed with water For example NaOH will dissolve in water to create a solution with Basic Properties Na+ OH- Na+ OH- Na+ OH- OH- OH- Na+ OH- Na

  9. Bases are used in soaps Bases are used to make paper, in oven cleaners, and to unclog drains Ammonia is a base and is used in many household cleaners

  10. The pH scale measures how acidic or basic a substance is. THE PH scale • With the exception of distilled water almost everything is an Acid or a Base. • pH or “ Power of Hydrogen” tells us the concentration of H+ ions in solution.

  11. The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value.

  12. Question #1 • Lemon juice has a pH of 2.2. Is it an acid or a base?

  13. Question #2 • Detergents such as Tide have a pH of about 10. Is Tide an acid or a base?

  14. Question #3 • Seawater has a pH of 8.2. Is seawater an acid or a base?

  15. Question #4 • The inside of your mouth has a pH of 7. Is it an acid or a base?

  16. Your Homework Determine at LEAST 3 properties of an Acid or Base look online via Google Partner Up Determine who will do acid / base

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