Chemical Reactions

Evidence of Chemical Reactions

Representing Chemical Reactions

All chemical reactions have two parts: Reactants and Products.

Write the skeleton equation for the following word equations Hydrogen and bromine gases react to

yield hydrogen bromide.

Carbon monoxide and oxygen react to form carbon dioxide.

Counting Atoms

Hydrogen gas and Chlorine gas combine to form hydrogen chloride gas.

Example Problem

Write a balanced chemical equation for the reaction in which aqueous sodium hydroxide and aqueous calcium bromide produce solid calcium hydroxide and aqueous sodium bromide.

Diet Coke and Mentos “Reaction”

Four Types of Chemical Reactions

Synthesis Reactions

Decomposition Reactions

Single-Replacement Reaction

Double Replacement

Combustion Reactions

Reactions in Aqueous Solution

Precipitation Reactions

1. All salts of Group IA, and ammonium are soluble.  2. All salts of nitrates, chlorates and acetates are

soluble. 3. All salts of halides are soluble except those of

silver(I),  copper(I), lead(II), and mercury(I).  4. All salts of sulfate are soluble except for barium

sulfate, lead(II) sulfate, and strontium sulfate.  5. All salts of carbonate, phosphate and sulfite are

insoluble, except for those of group IA and ammonium. 

6. All oxides and hydroxides are insoluble except for those of group IA, calcium, strontium and  barium. 

7. All salts of sulfides and insoluble except for those of Group IA and IIA elements and of ammonium.

Solubility Rules

Practice

Write the ionic equations and the net ionic equation for the reactions…

Ba(NO3)2(aq) + Na2CO3(aq) BaCO3(s) + NaNO3(aq)

Write the chemical, complete ionic, and net ionic equations for the reaction between aqueous solutions of barium nitrate and sodium carbonate that forms the precipitate barium carbonate.

Acid-Base Reactions

Write a chemical, complete ionic, and net ionic equations for the reaction between hydrochloric acid and aqueous lithium hydroxide. This reaction produces water and aqueous lithium chloride.

Test Review

Aqueous barium chloride and aqueous sodium fluoride are mixed.

Aqueous copper (I) nitrate and aqueous potassium sulfide are mixed

Aqueous sodium hydroxide and aqueous copper (II) chloride are mixed.

Aqueous sodium carbonate and aqueous calcium nitrate are mixed.

Aqueous sodium sulfate and aqueous potassium carbonate are mixed.