What do you see in common from these two groups below? Warm-Up 3/24/15 What do you see in common from these two groups below? Group 1 Group 2 HCl H2SO4 HNO3 H3PO4 KOH NaOH Ca(OH)2 Mg(OH)2

History of Acids and Bases Identify Acids and Bases 3/24/15 Objective Identify Acids and Bases 3/24/15 Agenda History of Acids and Bases Identify Acids and Bases Chemical Burn video

What do you see in common from these two groups below? Warm-Up 3/24/15 What do you see in common from these two groups below? Group 1 Group 2 HCl H2SO4 HNO3 H3PO4 KOH NaOH Ca(OH)2 Mg(OH)2

Do you see anything in common from the group below? Follow-up Do you see anything in common from the group below? NH3 H2O NO2-

Acids and bases were only identified by characteristics: At first… Acids and bases were only identified by characteristics: Acids Bases Sour React with metals Bitter Slippery

Svante Arrhenius realized… Then… Svante Arrhenius realized… Acids Bases HCl H2SO4 HNO3 H3PO4 KOH NaOH Ca(OH)2 Mg(OH)2

These don’t fit into the definition NH3 H2O NO2- But… These don’t fit into the definition NH3 H2O NO2- So… Bronsted and Lowry came along…

By Wednesday Homework Test make-up – Stoichiometry Finish Identifying Acids and Bases worksheet http://www.pleasanton.k12.ca.us/fhsweb/hansen/chemlab/CookieChocolateChip.pdf 8