2/20/18 Get ready for Bell Work..

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Presentation transcript:

2/20/18 Get ready for Bell Work.

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2. When balancing equations, you can NEVER change the ... a. Coefficient b. Subscript c. Whole number d. Atom

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2. When balancing equations, you can NEVER change the ... a. Coefficient b. Subscript c. Whole number d. Atom

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Success Criteria I can name the 4 types of reactions. TOC: #21 TYPES OF CHEMICAL REACTIONS NOTES #22 Types of reactions practice

Objectives 4 Types of Reactions: Describe four types of chemical reactions. Classify a chemical equation as one of four types of chemical reactions. 4 Types of Reactions: Synthesis Reaction Decomposition Reaction Single-Displacement Reaction Double-Displacement Reaction

Synthesis Reactions: Synthesis reaction is a reaction in which two or more substances combine to form one new compound. Pattern: A + B  AB 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: 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: 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: AX + BY  AY + BX Ex. KNO3 + H2CO3  K2CO3 + HNO3

WHAT TYPE OF CHEMICAL REACTION IS THIS? Exit Ticket Carbonic acid is an unstable compound. At room temperature, carbonic acid produces carbons dioxide and water according to the following equation: H2CO3  CO2 + H2O WHAT TYPE OF CHEMICAL REACTION IS THIS?