Types of Chemical Reactions

Page 1:

  • Chemical reactions involve atoms rearranging in predictable patterns

  • Recognizing patterns allows us to predict future behavior

  • Chemists classify chemical equations according to their patterns

  • Model 1 shows different types of reactions: Synthesis, Decomposition, Single Replacement, and Double Replacement

  • Each set of reactions in Model 1 has specific examples

Page 2:

  • Each set of reactions in Model 1 has a specific description

  • Set P involves ionic compounds dissolved in water switching partners

  • Set B involves one compound breaking into elements or smaller compounds

  • Set A involves two or more elements or compounds combining to form one product

  • Set C involves part of an ionic compound being removed and replaced by a new element

  • Definitions of synthesis, decomposition, and replacement in the English language

Page 3:

  • Each set of reactions in Model 1 has a specific general name

  • Single Replacement Reaction belongs to Set C

  • Synthesis Reaction belongs to Set A

  • Double Replacement Reaction belongs to Set D

  • Decomposition Reaction belongs to Set B

  • Questions about reactants and products in different types of reactions

Page 4:

  • Examples of reactions in Model 1 and their types (synthesis, decomposition, single replacement, double replacement)

  • Correct formulas for magnesium oxide and elemental oxygen

  • Errors made by students in writing chemical equations

  • Correct balanced chemical equation for the synthesis of magnesium oxide

  • Predicting products and writing correct balanced equations for single replacement and double replacement reactions

  • Identifying the type of chemical reaction and balancing the equation for a given word equation

Page 5: Chemical Reactions and Predicting Products

  • Chemists use knowledge of synthesis, decomposition, single replacement, and double replacement to predict chemical reactions.

    • Atoms or ions will only combine in ways that make them stable.

    • Pay attention to ion charges, natural state of elements, and formulas of common molecular substances.

  • After predicting products, chemists apply the law of conservation of mass and balance the chemical equation using coefficients.

Examples of Predicting Products and Balancing Equations

a. 2Al(s) + N2(g) → 2AIN

  • Predicted products: 2AIN

  • Balanced equation: 2Al(s) + N2(g) → 2AIN

b. Dinitrogen oxide(g) → nitrogen gas + oxygen gas

  • Predicted products: nitrogen gas + oxygen gas

  • Balanced equation: 2N200 (q) → 2N2 (g) + 02(5)

c. SrCl(aq) + 2AgNO3(aq) → 2AgCI + (NO3)2

  • Predicted products: 2AgCI + (NO3)2

  • Balanced equation: SrCl(aq) + 2AgNO3(aq) → 2AgCI + (NO3)2

d. Chromium(III) nitrate(aq) + zinc chloride(aq) → 3 Zn C126qg + 2CnCl351

  • Predicted products: 3 Zn C126qg + 2CnCl351

  • Balanced equation: Chromium(III) nitrate(aq) + zinc chloride(aq) → 3 Zn C126qg + 2CnCl351

e. 2Na(s) + Cl2(g) → 2NaCl(s)

  • Predicted products: 2NaCl(s)

  • Balanced equation: 2Na(s) + Cl2(g) → 2NaCl(s)

f. Zn(s) + 2HCl(aq) → Zn C12(aq) + H2(G)

  • Predicted products: Zn C12(aq) + H2(G)

  • Balanced equation: Zn(s) + 2HCl(aq) → Zn C12(aq) + H2(G)

Page 6: Combustion Reactions

  • Combustion reactions involve the burning of hydrocarbons.

  • In Model 2, examples of combustion reactions are given.

  • The products in all combustion reactions in Model 2 are CO2 and H2O.

  • The common reactant in all combustion reactions in Model 2 is oxygen (O2).

Predicting Products and Balancing Equations for Combustion Reactions

a. C,H1 + 802 → SCO2 + 6H2O

  • Predicted products: SCO2 + 6H2O

  • Balanced equation: C,H1 + 802 → SCO2 + 6H2O

b. 2C2H2 + 50 → 4CO2 + 4H20

  • Predicted products: 4CO2 + 4H20

  • Balanced equation: 2C2H2 + 50 → 4CO2 + 4H20

c. 2C,HOH +42O2 → 6CO2 + 18H2Q

  • Predicted products: 6CO2 + 18H2Q

  • Balanced equation: 2C,HOH +42O2 → 6CO2 + 18H2Q

d. CHHOO + 602 → 6 CO2 + 6H20

  • Predicted products: 6 CO2 + 6H20

  • Balanced equation: CHHOO + 602 → 6 CO2 + 6H20

Classification of Hydrocarbons

  • Hydrocarbons are molecules that consist exclusively of carbon and hydrogen.

Combustion Reactions and Other Compound Types

  • Compounds like isopropyl alcohol (C,H,OH) and glucose can also undergo combustion.

  • Predicted products and balanced equations can be determined for these combustion reactions.

Classification of Combustion Reactions

  • Combustion reactions cannot be classified as synthesis, decomposition, single replacement, or double replacement.

  • Combustion reactions have two products, require two reactants, do not involve displacement of one species by another,