Bell Work 2/4/16

Student Learning Objectives SPI IDENTIFY THE COMMON OUTCOME OF ALL CHEMICAL CHANGES SPI CLASSIFY COMMON SUBSATNCES AS ELEMNTS OR COMPOUNDS BASED ON THEIR SYMBOLS OR FORMULAS SPI INTERPRET THE RESULTS OF AN INVESTIGATION TO DETERMINE WHETHER A PHYSICAL OR CHEMICAL CHANGES HAS OCCURRED. SPI IDENTIFY THE REACTANTS AND PRODUCTS OF A CHEMICAL REACTION SPI RECOGNIZE THAT IN A CHEMICAL REACTION THE MASS OF THE REACTANTS IS EQUAL TO THE MASS OF THE PRODUCTS (LAW OF CONSERVATION OF MASS) TOC: #73 TYPES OF CHEMICAL REACTIONS NOTES

Obectives Describe four types of chemical reactions.Describe four types of chemical reactions. Classify a chemical equation as one of four types of chemical reactions. Classify a chemical equation as one of four types of chemical reactions.

4 Types of Reactions: Synthesis ReactionSynthesis Reaction Decomposition ReactionDecomposition Reaction Single-Displacement ReactionSingle-Displacement Reaction Double-Displacement ReactionDouble-Displacement Reaction Video

Synthesis Reactions: Synthesis reaction is a reaction in which two or more substances combine to form one new compound. Pattern: Pattern: A + B  AB Ex. N2 + H2  NH3 Ex. N2 + H2  NH3

Decomposition Reactions: A decomposition reaction is a reaction in which a single compound breaks down to form two or more simpler substances. Decomposition is the reverse of synthesis. Pattern: Pattern: AB  A + B Ex. Ag2O  Ag + O2

Single-Displacment Reactions: A single-displacement reaction is a reaction in which one element replaces another element that is part of a compound. The products of single- displacement reactions are a new compound and a different element. In a single-displacement reaction, a more reactive element can displace a less reactive element in a compound. Pattern: Pattern: A + BX  AX + B Ex. K + MgBr  KBr + Mg

Double-Displacment Reactions: A double-displacement reaction is a reaction in which ions from two compounds exchange places. One of the products of this type of reaction is often a gas or a precipitate. Pattern: Pattern: AX + BY  AY + BX Ex. KNO3 + H2CO3  K2CO3 + HNO3

Elbow Partner  Practice Chemical Equation #2 Balance the equation Balance the equation Write the type of reaction on the line Write the type of reaction on the line

Independent Work  Balance Chemical Equations #3 Balance each equation Balance each equation Write the type of reaction on the line Write the type of reaction on the line Homework if you do NOT finish Homework if you do NOT finish

Exit 2/4/16  Carbonic acid is an unstable compound. At room temperature, carbonic acid produces carbons dioxide and water according to the following equation: H 2 CO 3  CO 2 + H 2 O WHAT TYPE OF CHEMICAL REACTION IS THIS?