Chemical Reactions. Section 9.1 Reactions and Equations Section 9.2 Classifying Chemical Reactions Section 9.3 Reactions in Aqueous Solutions. Click a hyperlink or folder tab to view the corresponding slides. Exit. Chapter Menu. Section 9.1 Reactions and Equations.
Recognizeevidence of chemical change.
chemical change:a process involving one or more substances changing into a new substance
Representchemical reactions with equations.
Chemical reactions are represented by balanced chemical equations.Section 9-1
In word equations, aluminum(s) + bromine(l) → aluminum bromide(s) reads as “aluminum and bromine react to produce aluminum bromide”.
Skeleton equations use symbols and formulas to represent the reactants and products. Al(s) + Br(l) → AlBr3(s)
Skeleton equations lack information about how many atoms are involved in the reaction.Section 9-1
There are four types of chemical reactions: synthesis, combustion, decomposition, and replacement reactions.Section 9-2
Describe aqueous solutions.
Write complete ionic and net ionic equations for chemical reactions in aqueous solutions.
Predict whether reactions in aqueous solutions will produce a precipitate, water, or a gas.
solution: a uniform mixture that might contain solids, liquids, or gasesSection 9-3
complete ionic equation
net ionic equation
Double-replacement reactions occur between substances in aqueous solutions and produce precipitates, water, or gases.Section 9-3
2NaOH(aq) + CuCl2(aq) → 2NaCl(aq) + Cu(OH)2(s)
2Na+(aq) + 2OH–(aq) + Cu2+ (aq)+ 2Cl–(aq) → 2Na+(aq) + 2Cl–(aq) + Cu(OH)2(s)Section 9-3
Ions that do not participate in a reaction are called spectator ionsand are not usually written in ionic equations.
2OH–(aq) + Cu2+(aq) → Cu(OH)2(s)Section 9-3
HCl(aq) + NaHCO3(aq) → H2CO3(aq) + NaCl(aq)
H2CO3(aq) → H2O(l) + CO2(g)
HCl(aq) + NaHCO3(aq) + H2CO3(aq) → H2CO3(aq) + NaCl(aq) + H2O(l) + CO2(g)
HCl(aq) + NaHCO3(aq) → H2O(l) + CO2(g) + NaCl(aq)Section 9-3
Some physical changes are evidence that indicate a chemical reaction has occurred.
Word equations and skeleton equations provide important information about a chemical reaction.
A chemical equation gives the identities and relative amounts of the reactants and products that are involved in a chemical reaction.
Balancing an equation involves adjusting the coefficients until the number of atoms of each element is equal on both sides of the equation.Study Guide 1
In aqueous solutions, the solvent is always water. There are many possible solutes.
Many molecular compounds form ions when they dissolve in water. When some ionic compounds dissolve in water, their ions separate.
When two aqueous solutions that contain ions as solutes are combined, the ions might react with one another. The solvent molecules do not usually react.
Reactions that occur in aqueous solutions are double-replacement reactions.Study Guide 3
The law of conservation of mass requires what in a chemical reaction equation?
A.both sides of the equation to contain the same substances
B.the reactants to have the same amount of molecules as the products
C.both sides to have the same amount of atoms of each element
D.the products to have fewer molecules than the reactantsChapter Assessment 1
Click any of the background top tabs to display the respective folder.
Within the Chapter Outline, clicking a section tab on the right side of the screen will bring you to the first slide in each respective section.
Simple navigation buttons will allow you to progress to the next slide or the previous slide.
The Chapter Resources Menu will allow you to access chapter specific resources from the Chapter Menu or any Chapter Outline slide. From within any feature, click the Resources tab to return to this slide.
The “Return” button will allow you to return to the slide that you were viewing when you clicked either the Resources or Help tab.
To exit the presentation, click the Exit button on the Chapter Menu slide or hit Escape [Esc] on your keyboards while viewing any Chapter Outline slide.Help