Chemistry Chapter 8

Write the 2 different

balanced equations that show the incomplete combustion of heptene, C7H14?

Combustion Reaction

Chemical change in which oxygen reacts with another substance often producing energy in form of heat and light

Skeleton Equation

Chemical equation that does not indicate the relative amounts of reactants and products

A double-replacement reaction takes place when aqueous cobalt (III) chloride reacts with aqueous lithium hydroxide. One of the products of this reaction would be

Co(OH)3

The product of a combination reaction is Ba(OH)2. If one of the reactants was H2O, what was the other reactant?

BaO

What is the balanced chemical equation for the reaction that takes place between bromine and sodium iodide?

Br2+2NaI=2NaBr+I2

Aluminum chloride and bubbles of hydrogen gas are produced when metallic aluminum is placed in hydrochloric acid. What is the balanced equation for this reaction?

2Al+6HCl=2AlCl3+3H2

Write the complete balanced equation for a reaction when potassium and barium chloride react, potassium chloride and barium hydroxide are formed

2KOH+BaCl2=2KCl+Ba(OH)2

When the equation, Fe + Cl2 + FeCl3, is balanced, what is the coefficient for Cl2?

3

Reactant

A starting substance in a chemical reaction

Product

A substance formed in a chemical reaction

What must be true in order for the reaction 2Al+6HCL= 2 AlCl3+3H2(arrow pointing up) to occur

Al must be above H on the activity series

Chemical Equation

Expression representing a chemical reaction

The equation H3PO4 + 3KOH=K3PO+3H2O is an example of which type of reaction

acid/base reaction

In order to predict whether or not a single-replacement reaction takes place, we need to consult a chart which shows the

activity series of metals or periodic table

In every balanced chemical equation each side of the equation has the same number of

atoms of each element

What happens in a double-replacement reaction?

exchange of positive ions between 2 reacting compounds

In the Chemical equations, H2O2(aq) = H2O(l)+O2(g), thee H2O2 is a

reactant

In a combustion reaction what are the general reactants and the products

reaction-oxygen product-heat & light

What conditions must be met for the decomposition of a simple binary compound?

reactions require energy in the form of heat, light or electricity

Why must Chemical equations be balanced?

so it obeys the law of conservation of mass

What happens in all chemical reactions?

the reactant change into one or more new substances (the products)

What do everyday equation equations describe?

to find the correct quantity of and reactant & product needed

What does a skeleton equations describe?

writing a skeleton equation with correct formulas for reactants & products is an important first step is to obtain the correct formula

What is a catalyst?

a substance that speeds up the rate of reaction but use up matter reaction (neither reaction pr product)

Balance Equation

A chemical equation in which mass is conserved

Know all the conditions which must be met for a double-replacement reaction to occur

*product only slightly soluble and preciptitates from solution *product is a gas that bubbles out of the mixture *product is a molecule compound like water

Know all the symbols used in equations that were presented in the text, and in notes, and the explanation of those symbols.

+ separates reactants = yields double arrows - reversible reaction (s) solid (l) liquid (g) gas (aq) (triangle with arrow)

What are the missing coefficients for the skeleton equation below? AlCl3 + NaOH= Al(OH)3+NaCl

1, 3, 1, 3

What are the missing coefficients for the skeleton equation below? N2 + H2 = NH3

1, 3, 2

What are the missing coefficients for the skeleton equation below? Al2(SO4)3(aq)+KOH(aq)=Al(OH)3(aq)+K2SO4(aq)

1, 6, 2, 3

When the following equation is balanced, KClO3(s)=KCl(s)+O2(g) the coefficient of KClO3 is

2

What are the missing coefficients for the skeleton equation below? Cr(s)+Fe(NO3)2(aq)=Fe(s)+Cr(NO3)3(aq)

2, 3, 3,2

If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for fluorine be? nitrogen trifluoride= nitrogen + fluorin

3F2

What are the missing coefficients for the skeleton equation below? NH3(g)+O2(g)=N2(g)+H2O(l)

4, 3, 2, 6

When the equation for the complete combustion of ethanol C2H5OH, is balanced what is the coefficient for oxygen?

7

Single Replacement Reaction

Chemical change in which 1 element replaces a second element in a compound

Decomposition Reaction

Chemical change in which a single compounds broken down into 2 or more simple products

If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for iodine be?

I2

If a combination reaction takes place between potassium and chlorine, what is the product?

KCl

In the activity series of metals, which metal(s) will displace hydrogen from an acid?

Mg, Al, Zn, Fe, Pb

Write the correct skeleton equation for the reaction that takes place when solid phosphorus combines with oxygen gas to from diphosphorus pentoxide

P(s)+ O2(g) = P2O5(s)

Write a balanced equation for the combination reaction that takes place when iron (III) oxide is formed from its constituent elements

PbO2=Pb+O2

Write a balanced equation to represent the decomposition of lead (IV) oxide.

PbO2=Pb+O2

What are the correct formulas and coefficients for the products of this double-replacement reaction RbOH+H3PO4=

Rb3PO4=3H2O

What do chemical equations describe?

Reactants=products

The equation Mg(s) + 2HCl (aq)=MgCl2(aq) + H2(upward arrow)

Redox reaction

Activity Series of Metals

Table listing metals in order of decreasing activity

The equation 2C3H7OH + 9O2 = 6CO2 (arrow pointing up) + 8H2O (arrow pointing up)

combustion

The reaction, 2Fe+3Cl2=2FeCl3, is an example of which type of reaction

combustion reaction

Be able to look at a combustion reaction and know if the reaction is complete or incomplete

complete combustion release large amount of energy as heat oxygen insufficient combustion is incomplete

Know what conditions must be met for a single-replacement reactions to occur.

for a metal to replace a metal it must lower than it on the activity series nonmetal can replace nonmetal if the halogen is higher than the other

What does the symbol triangle in a chemical equation mean?

heat

What happens when a chemical reactions occurs?

it changes into one or more new substances