Unit 7 Acid/Base Chemistry and Chemical Reactions Chemistry I Mr. 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 (H 1+ or H 3 O 1+ ) Base – Produce hydroxide ions (OH 1- )

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 H 2

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 + H 2 O Acid + Base  Water + Salt Neutralization Reaction – acids can cancel out bases

Strength of an Acid or Base The strength depends on the amount of H 1+ 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