Unit 5A Chemical Reactions Review

Unit 5A Chemical Reactions Review

Multiple Choice

What is the correct name of the compound P₂O₅

• phosphorous oxide

• diphosphorous pentoxide

• phosphorous pentoxide

Multiple Choice

What is the correct name for CF₄

• Carbon fluoride

• Carbon IV fluoride

• Carbon tetrafluoride

Multiple Choice

The correct name for the compound with the formula PbSO₄ is

• Lead (II) Sulfate

• Lead (III) Sulfate

• Lead Sulfite

• Lead Sulfate

Multiple Choice

What is the correct name for the compound with the formula (NH₄)₃PO₄

• Ammonium Pyrophosphite

• Ammonium Phoporylate

• Ammonium Phosphite

• Ammonium Phosphate

Multiple Choice

Formula for sulfur dioxide

• S₂O

• SO₂

• S₂O₂

• (SO)₂

Multiple Choice

Formula for Disilicon Heptasulfide

• SiS₆

• SiS₇

• Si₂S₆

• Si₂S₇

Multiple Choice

Formula for lead (II) chloride

• PbCl₂

• Pb₂Cl

• Pb₂Cl₃

• Pb₃Cl₂

Multiple Choice

Formula for barium sulfide

• B₂S₃

• BaS

• Ba₂S

• BaS₂

Balancing Chemical Equations

• Need equal numbers of each type of atom on the product and reactant side of the reaction.

• Balance using coefficients

• Can only change coefficients, NOT subscripts

• Balance to fulfill the law of conservation of mass

Multiple Choice

Balanced this equation:

Sb₂S₃ + O₂ ---> Sb + SO₂

• It is balanced.

• Sb₂S₃ + O₂ ---> 2Sb + SO₂

• Sb₂S₃ + 3O₂ ---> 2Sb + 3SO₂

• 3Sb₂S₃ + 3O₂ ---> 2Sb + SO₂

Multiple Choice

Balance this equation:

H₂ + Cl₂ ---> HCl

• It is balanced.

• H₂ + Cl₂ ---> 2HCl

• 3H₂ + Cl₂ ---> 6HCl

• H₂ + 3Cl₂ ---> 6HCl

Multiple Choice

Is the following equation balanced?

Al + O₂ ---> 2Al₂O₃

• YES

• NO

Multiple Choice

Balance this equation

_Al +_HCl --> _H₂ +_AlCl₃

• 2,6,3,2

• it's already balanced

• 4,12,3,4

• 2,1,4,5

RedOx Reactions

• LEO: Loss of Electrons is Oxidation

• GER: Gain of Electrons is Reduction

• Reduction can't occur without oxidation

• Use oxidation numbers to determine what has been oxidized and reduced

Multiple Choice

What is the oxidation number of nitrogen in N₂?

• -3

• 0

• +4

• -1

Multiple Choice

What is the oxidation number of Carbon in CH₄?

• +1

• -1

• +4

• -4

Multiple Choice

Oxidation is the _________ of electrons.

• loss

• gain

• sharing

• transfer

Multiple Choice

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

Multiple Choice

Which statement is true:

Mg → Mg²⁺ + 2e^–

• Mg gains 2 electrons

• Mg²⁺ loses 2 electrons

• Mg loses 1 electron

• Mg loses 2 electrons

Multiple Choice

Which of the following half reactions correctly represents a reduction half reaction?

• Fe →Fe²⁺ + 2e^-

• Pb⁴⁺ + 2e^- →Pb²⁺

• 2O^-2 →O₂ + 4e^-

• Fe + 3e^- →Fe³⁺

5 Main Types of Chemical Reactions

Multiple Choice

Always starts with a Hydrocarbon that reacts with oxygen and produces carbon dioxide and water.

• Decomposition

• Synthesis

• Combustion

• Single Replacement

Multiple Choice

3Ca + 2AlCl₃ --> 3CaCl₂ + 2Al

• Synthesis

• Decomposition

• Single Displacement

• Double Displacement

Multiple Choice

What type of chemical reaction is this?
Al(OH)₃ → Al₂O₃  + H₂O

• Decomposition
• Combustion
• Synthesis
• Single Replacement 

Multiple Choice

The following is what type of reaction:

NH₃ + HCl → NH₄Cl

• Synthesis

• Decomposition

• Single Replacement Replacement

• Double Replacement Replacement

Multiple Choice

The following is what type of reaction:

PbCl₂ + AgNO₃ → Pb(NO₃)₂ + AgCl

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Solubility Rules

Determine if a substance is soluble in water [(aq) = aqueous], or if it will form a precipitate [(s) = solid] because it is insoluble in water.

Which one will form a precipitate? Pb(NO₃)₂ or PbCl₂?

Multiple Choice

KBr

• Soluble

• Insoluble

Multiple Choice

Silver Iodide

• Soluble

• Insoluble

Multiple Choice

KOH

• Soluble

• Insoluble

Multiple Choice

PbI₂

• Soluble

• Insoluble

Multiple Choice

NiCl₂

• Soluble

• Insoluble