Unit 7Acid/Base Chemistry

andChemical Reactions

Chemistry IMr. Patel

SWHS

Topic Outline• MUST know chemical nomenclature!!!• Acid/base Definitions and Properties (19.1)• Types of Chemical Reactions (11.2)• Balancing Equations (11.1)• Parts of a Chemical Equation (11.1)• Factors Affecting Reaction Rates (18.1)

Acid/Base Chemistry

Properties of Acids

Properties of Bases

Neutralization

Strength of an Acid or Base

pH Scale

Indicator

Titration

• Titration Video

• Titrations are used to determine the concentration of an unknown acid or base

Biological Use of Acids and Bases

• How Anatacids Work

• Antacids are used to treat heartburn

Acid/Base Chemistry

• Play a large role in biological systems

• Acids – Produce protons (H1+ or H3O1+)

• Base – Produce hydroxide ions (OH1-)

Properties of Acids

• EX: Acetic Acid, Sulfuric Acid, Hydrochloric Acid, Carbonic acid

• Tart or Sour Taste• Electrolytes – conduct electricity– Strength depends on the acid

• React with metals to produce H2

Properties of Bases

• EX: Ammonia, soap, bleach, antacids• Bitter Taste• Feels slippery• Electrolytes – conduct electricity– Strength depends on the acid

• Stomach Acid and Milk of Magnesia – Magnesium hydroxide in water

Neutralization

• HCl + NaOH NaCl + H2O

• Acid + Base Water + Salt

• Neutralization Reaction – acids can cancel out bases

Strength of an Acid or Base

• The strength depends on the amount of H1+ ions in solution

• This is called pH scale

• Works by a power of 10

pH Scale• Acids have pH less

than 7

• Bases have pH greater than 7

• Pure Water is 7

Indicator

• Weak acids or bases

• They change color at a certain pH

• Indicate the change from acidic to basic

• Phenolphthalein changes form colorless to deep pink as it goes acidic to basic

Titration

• Titration Video

• Titrations are used to determine the concentration of an unknown acid or base

Biological Use of Acids and Bases

• How Anatacids Work

• Antacids are used to treat heartburn