chapter 11 chemistry

What are the coefficients that will balance the skeleton equation below? AlCl3 + NaOH -> Al(OH)3 + NaCl 1, 3, 1, 3 3, 1, 3, 1 1, 1, 1, 3 1, 3, 3, 1

1, 3, 1, 3

What are the coefficients that will balance the skeleton equation below? N2 + H2 -> NH3 1, 1, 2 1, 3, 3 3, 1, 2 1, 3, 2

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, 3, 2, 3 2, 12, 4, 6 4, 6, 2, 3 1, 6, 2, 3

1, 6, 2, 3

When the following equation is balanced, what is the coefficient for HCl? Mg(s) + HCl(aq) -> MgCl2(aq) + H2(g) 6 3 1 2

2

What are the missing coefficients for the skeleton equation below? Cr(s) + Fe(NO3)2(aq) -> Fe(s) + Cr(NO3)3(aq) 4, 6, 6, 2 2, 3, 2, 3 2, 3, 3, 2 1, 3, 3, 1

2, 3, 3, 2

Complete and balance the following equation. Al + Cl2 ->

2Al + 3Cl2 = 2AlCl3 Al + Cl2 = AlCl3

Complete and balance the following equation: K3PO4 + BaCl2 ->

2K3PO4(aq) + 3BaCl2(aq) -> Ba3(PO4)2(s) + 6KCI(aq)

When the equation Fe + Cl2 -> FeCl3 is balanced, what is the coefficient for Cl2? 1 2 3 4

3

Write a balanced net ionic equation for the following reaction. H3PO4(aq) + Ca(OH)2(aq) -> Ca3(PO4)2(aq) + H2O(l)

3Ca(OH)2(aq) + 2H3PO4(aq) = 6H2O(I) + Ca3(PO4)2(s)

If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for fluorine be? nitrogen trifluoride -> nitrogen + fluorine 6F2 F3 6F 3F2

3F2

Balance the following equation. (NH4)2CO3 + NaOH -> Na2CO3 + NH3 + H2O

5(NH4)2 + 2CO3 + 4NaOH = 2Na2CO3 + 12NH3 = 4H20

What is the driving force in the following reaction? Ni(NO3)2(aq) + K2S(aq) -> NiS(s) + 2KNO3(aq) A gas is formed. A precipitate is formed. Ionic compounds are reactants. Ionic compounds are products.

A precipitate is formed.

In order for the reaction 2Al + 6HCl -> 2AlCl3 +3H2 to occur, which of the following must be true? Al must be above Cl on the activity series. Al must be above H on the activity series. Heat must be supplied for the reaction. A precipitate must be formed.

Al must be above H on the activity series.

Which of the following statements is NOT correct? The only way to determine the products of a reaction is to carry out the reaction. All chemical reactions can be classified as one of five general types. Complete combustion has occurred when all the carbon in the product is in the form of carbon dioxide. A single reactant is the identifying characteristic of a decomposition reaction.

All chemical reactions can be classified as one of five general types.

What is the balanced chemical equation for the reaction that takes place between bromine and sodium iodide? Br2 + NaI -> NaBr2 + I Br2 + 2NaI -> 2NaBr + I2 Br + NaI2 -> NaBrI2 Br + NaI2 -> NaBr + I2

Br2 + 2NaI -> 2NaBr + I2

The complete combustion of which of the following substances produces carbon dioxide and water? C8H18 K2CO3 CaHCO3 NO

C8H18

Complete and balance the following equation. CH4 +O2 Δ-> CO2 +

CH4 + 2O2 -> CO2 + 2H20

A double-replacement reaction takes place when aqueous cobalt(III) chloride reacts with aqueous lithium hydroxide. One of the products of this reaction is________ . Co(OH)3 Co(OH)2 LiCo3 LiCl3

Co(OH)3

What does the symbol Δ → in a chemical equation mean? Heat is supplied to the reaction. A catalyst is needed. yields precipitate

Heat is supplied to the reaction.

A double-replacement reaction takes place when aqueous Na2CO3 reacts with aqueous Sn(NO3)2. You would expect one of the products of this reaction to be ____. NaNO3 NaSn Sn(CO3)2 CNO3

NaNO3

Which of the following statements is NOT true about what happens in all chemical reactions? The ways in which atoms are joined together are changed. New atoms are formed as products. The starting substances are called reactants. The bonds of the reactants are broken and new bonds of the products are formed.

New atoms are formed as products.

Use the activity series of metals to complete a balanced chemical equation for the following single replacement reaction. Ag(s) + KNO3(aq) -> AgNO3 + K AgK + NO3 AgKNO3 No reaction takes place because silver is less reactive than potassium.

No reaction takes place because silver is less reactive than potassium.

Which of the following is the correct skeleton equation for the reaction that takes place when solid phosphorus combines with oxygen gas to form diphosphorus pentoxide? P(s) + O2(g) → PO2(g) P(s) + O(g) → P5O2(g) P(s) + O2(g) → P2O5(s) P2O5(s) → P(s) O2(g)

P(s) + O2(g) → P2O5(s)

Which of the following is a balanced equation representing the decomposition of lead(IV) oxide? PbO2 -> Pb + 2O PbO2 -> Pb + O2 Pb2O -> 2Pb + O PbO -> Pb + O2

PbO2 -> Pb + O2

What are the correct formulas and coefficients for the products of the following double-replacement reaction? RbOH + H3PO4 -> Rb(PO4)3 + H2O RbPO4 + 2H2O Rb3PO4 + 3H2O H3Rb + PO4OH

Rb3PO4 + 3H2O

Which of the following statements is NOT true about the decomposition of a simple binary compound? The products are unpredictable. The products are the constituent elements. The reactant is a single substance. The reactant could be an ionic or a molecular compound.

The products are unpredictable.

Which of the following statements is NOT true about double-replacement reactions? The product may precipitate from solution. The product may be a gas. The product may be a molecular compound. The reactant may be a solid metal.

The reactant may be a solid metal.

Which of the following statements is true about single-replacement reactions? They are restricted to metals. They involve a single product. Two reactants produce two products. Any metal replaces any other metal.

Two reactants produce two products.

skeleton equation

a chemical equation that does not indicate relative amounts of reactants and products

chemical equation

a concise representation of a chemical reaction

product

a new substance formed in a chemical reaction

decomposition reaction

a reaction in which a single compound is broken down into simpler substances

combustion reaction

a reaction in which oxygen reacts with another substance, often producing heat or light

single-replacement reaction

a reaction in which the atoms of one element replace the atoms of a second element in a compound

reactant

a starting substance in a chemical reaction

In order to predict whether or not a single-replacement reaction takes place, you need to consult a chart that shows the_______ . periodic table activity series of metals common polyatomic ions ionic charges of representative elements

activity series of metals

balanced equation

an equation in which each side has the same number of atoms of each element

The equation 2C3H7OH + 9O2 -> 6CO2 + 8H2O is an example of which type of reaction? combustion reaction single-replacement reaction double-replacement reaction decomposition reaction

combustion reaction

The reaction 2Fe + 3Cl -> 2FeCl3 is an example of which type of reaction? combustion reaction single-replacement reaction combination reaction decomposition reaction

combustion reaction

The equation H3PO4 + 3KOH -> K 3PO3 + 3H2O is an example of which type of reaction? double-replacement reaction combination reaction decomposition reaction single-replacement reaction

double-replacement reaction

Everyday equations describe______. thermonuclear reactions everyday processes chemical reactions biological chemistry

everyday processes

The products of a combustion reaction do NOT include_________ . water carbon dioxide carbon monoxide hydrogen

hydrogen

A catalyst is ________. the product of a combustion reaction not used up in a reaction one of the reactants in single-replacement reactions a solid product of a reaction

not used up in a reaction

In the activity series of metals, which metal(s) will displace hydrogen from an acid? only metals above hydrogen only metals below hydrogen any metal only metals from Li to Na

only metals above hydrogen

In a combustion reaction, one of the reactants is______ . hydrogen nitrogen oxygen a metal

oxygen

Chemical reactions . occur only in living organisms create and destroy atoms only occur outside living organisms produce new substances

produce new substances

In a double-replacement reaction, the_________ . products are always molecular reactants are two ionic compounds reactants are two elements products are a new element and a new compound

reactants are two ionic compounds

The equation Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g) is an example of which type of reaction? combination reaction single-replacement reaction decomposition reaction double-replacement reaction

single-replacement reaction

In a double-replacement reaction,_______ . the reactants are usually a metal and a nonmetal one of the reactants is often water the reactants are generally two ionic compounds in aqueous solution energy in the form of heat or light is often produced

the reactants are generally two ionic compounds in aqueous solution

A skeleton equation does NOT show which of the following? the correct formulas of the reactants and products the reactants on the left, the products on the right an arrow connecting the reactants to the products the relative amounts of reactants and products

the relative amounts of reactants and products

The product of a combination reaction is Ba(OH)2. If one of the reactants is H2O, what is the other reactant? Ba2O BaO BaH BaO2

BaO

activity series of metals

a list of metals in order of decreasing reactivity

Chemical equations must be balanced to satisfy_____ . the law of definite proportions the law of multiple proportions the law of conservation of mass Avogadro's principle

the law of conservation of mass

Symbols used in equations, together with the explanations of the symbols, are shown below. Which set is correct? (g), grams (l), liters (aq), dissolved in water (s), solid product

(aq), dissolved in water

When the equation KClO3(s) -> KCl(s) + O2(g) is balanced, the coefficient of KClO3 is _____. 1 2 3 4

2

Which of the following is the correctly balanced equation for the incomplete combustion of heptene, C7H14? C7H14 + 14O -> 7CO + 7H2O C7H14 + 7O2 -> 7CO + 7H2O 2C7H14 + 21O2 -> 14CO2 + 14H2O C7H14 + O2 -> C7O2 + 7H2

C7H14 + 7O2 -> 7CO + 7H2O

Complete and balance the following equation. CH4 + O2 Δ-> CO2 +

CH4 + 2O2 -> CO2 + 2H20

Chemical equations ______. describe chemical reactions show how to write chemical formulas give directions for naming chemical compounds describe only biological changes

describe chemical reactions