Chemical Reactions/Balancing Equations Study Guide

Combustion Reaction

Compounds react with oxygen to form carbon dioxide and water. Example: C10H8 + 12O2 --> 10CO2 + 4H2O

FeS + O2 --> Fe2O3 + SO2

__4__FeS + __7__O2 --> __2__Fe2O3 + __4__SO2

C3H8 + O2 --> CO2 + H2O

____C3H8 + __5__O2 --> __3__CO2 + __4__H2O

Reactant

______ is a substance that is used up during a chemical reaction.

Yield arrow

_________ separates the reactant and products sides of the equation.

Decomposition Reaction

A single substance breaks down to give two or more simpler products. Example: 2NaCl --> 2Na + Cl2

Neutralization Reaction

An acid and a base react to form salt and water. Example: NBr + NaOH --> NaBr + H2O

Double Displacement Reaction

Anions and cations of two ionic compounds exchange ions to form new compounds. Example: NaCl + AgNO3 --> NaNO3 + AgCl

Only ammonia

In a reaction in which "Ammonia breaks down to form hydrogen gas and nitrogen gas," which substances are the reactants?

Ca(NO3)2

In the following chemical reaction, CaCl2 + 2AgNO3 --> X + 2AgCl What is represented by X?

Single Displacement Reaction

In which one atom or ion replace with another atom or ion in a compound. Example: Zn + CuSO4 --> ZnSO4 + Cu

created, destroyed

No atoms are ________ or _________ in a chemical reaction.

same atoms

Products contain the _____ _______ as reactants.

AlBr3 + K2SO4 --> KBr + Al2(SO4)3

__2__ AlBr3 + __3__K2SO4 --> __6__KBr + ____Al2(SO4)3

Single Displacement Rxn

The chemical equation, A + BC --> AC + B, is an example of which type of reaction?

Neutralization Rxn

The chemical equation, HCl + NaOH --> NaCl + H2O, is an example of which type of reaction?

NaCl + F2 --> NaF + Cl2

__2__NaCl + ____F2 --> __2__NaF + ____Cl2

left, right

The reactants are shown on the ______ of the arrow, and the products are shown on the _______ of the arrow.

products

The substances generated by the chemical reaction are called ________.

Synthesis Reaction

Two or more reactants combine to form a new substance. Example: 2H2 + O2 --> 2H2O

C5H12 + 8O2 --> 5CO2 + 6H2O

Which of the following reactions represents a combustion reaction?

2K3PO4 + 3BaCl2 --> Ba3(PO4)2 + 6KCl

Which of the following reactions represents a double displacement reaction?

2NH3 + H2SO4 --> (NH4)2SO4

Which of the following reactions represents a synthesis reaction?

AB --> A + B

Which of the following reactions symbolizes a decomposition reactions?

CH4 + 2O2 --> CO2 + 2H2O

Write a balanced chemical equation for the following chemical equation.