Chemical Reactions Bonding Stoichio-

metry Gas Laws Solutions

100 100 100 100 100

200 200 200 200 200

300 300 300 300 300

400 400 400 400 400

500 500 500 500 500

Chem Rxns : 100

Identify the type of reaction and balance:

NaOH + CaBr2 Ca(OH)2 + NaBr

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Answer: Double Replacement (2:1:1:2)

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Identify the type of reaction and balance:

H2O H2 + O2

Answer: Decomposition (2:2:1)

Chem Rxns : 200

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Name all the types of chemical reactions and give their

examples using A, B, C, and D.Answer: Synthesis (A + B AB)

Decomposition (AB A + B)Single Replacement (AB + C AC + B)

Double Replacement (AB + CD AD + CB)

Chem Rxns : 300

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How does the law of conservation of mass relate

to chemical equations?Answer: Since matter cannot be created or

destroyed, chemical equations must be balanced to account for all reactants and products.

Chem Rxns : 400

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What is the balanced word equation for this chemical reaction:

FeCl3 + Zn Fe + ZnCl2Answer: 2 moles of iron (III) chloride reacts with 3 moles of zinc to yield 2 moles of iron

and 3 moles of zinc chloride.

Chem Rxns : 500

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Identify the type of bonding and the name of

CuCl2.Answer: Ionic Bonding,

Copper (II) Chloride

Bonding : 100

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Describe what happens in metallic bonding.

Answer: Negatively charged electrons move freely around positively charged ions of metals which bonds the atoms together.

Bonding : 200

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Identify the type of bonding and name of

H2O.Answer: Covalent, dihydrogen

monoxide.

Bonding : 300

BONUS

BONUS: 200 points

Describe the electron distribution in the bonding

of H2O.Answer: Polar bond because

electrons more attracted to the oxygen atom.

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Which bonding is stronger: ionic or covalent? Why?

Answer: covalent because electrons are shared between the

two atoms so more energy would be needed to separate the atoms.

Bonding : 400

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Which type of bonding allows molecules to conduct electricity strongly

in solid phase?

in aqueous phase? Why?Answer: Solid = metallic, because sea of

electrons will allow electrons to pass throughAqueous = ionic, because dissociated ions are charged and will allow electrons to pass through

Bonding : 500

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How many moles of oxygen are needed to react with 4 moles of

hydrogen?

H2 + O2 H2O

Answer: 2 moles of O2

Stoichiometry : 100

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If you have 2.5 moles of potassium sulfate, how many grams of potassium sulfate do

you have?Answer: 453.10 g K2SO4

Stoichiometry : 200

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Define limiting and excess reactants.

Answer: Limiting = substance completely used up in the reaction and determines how

much product can be formedExcess: substance not completely used up in

the reaction

Stoichiometry : 300

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You want to make 70 g of aluminum sulfate. How many grams of each

reactant do you need?

AlBr3 + K2SO4 KBr + Al2(SO4)3

Answer: 109.11 g AlBr3

and 106.96 g K2SO4

Stoichiometry : 400

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If you have 50 g of oxygen and 100 g C2H4, how many moles of

water can you make?

C2H4 + O2 CO2 + H2O

Answer: 1.04 moles H2O

Stoichiometry : 500

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What is the relationship between pressure and volume? Describe

what its graph looks like.Answer: Inverse because as pressure increases, volume will decrease. The graph is a curve line with a downward

slope.

Gas Laws : 100

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In Zain keeps 4 moles of gas in a container with a volume of 70 L at

a temperature of 500 K, what is the pressure inside the container?

Answer: 2.34 atm

Gas Laws : 200

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List all 5 gas laws and their equations.

Answer: Charles (V1/T1=V2/T2)Lussac (P1/T1=P2/T2)

Boyle (P1V1=P2V2)Combined (P1V1/T1=P2V2/T2)

Ideal (PV=nRT)

Gas Laws : 300

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Mr. Kaplan has 72 L of a gas that he holds at a pressure of 3.4 atm and a temperature of 256 K. How many moles of gas does he have?

Answer: 13.25 mol

Gas Laws : 400

A gas has the following properties: volume of 17 L, pressure of 2.3 atm,

and temperature of 150 K. If Ms. Yang doubles the temperature and

decreases the pressure in half, what is the new volume of the gas?

Answer: 68.00 LBack

Gas Laws : 500

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What is the equation to find molarity?

(name the variables)Answer: Molarity (M) = number of

moles of solute (n) / volume of solution (V)

Solutions : 100

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What is the equation for dilution molarity?

(name the variables)Answer: Initial Molarity (M1) * Initial Volume (V1) = Final Molarity (M2) * Final Volume (V2)

Solutions : 200

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If beaker A is an unsaturated solution and we add more solute to the breaker, what should we expect to see happen to the number of solid and dissolved

solute particles?Answer: dissolved = increase,

solid = stay zero until solution is saturated

Solutions : 300

Answer: 25 mL of solution A

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Solution A has a molarity of 0.5 M. If you want to make 50 mL of solution B which has a molarity of 0.25 M, how

many milliliters of Solution A would you need?

Solutions : 400

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Solution C contains 3.0 moles of CaCO3 in

400 mL. Solution D conatins 35 grams of H2SO4 in 5.0 L of solution. Which solution

is more concentrated?(mm CaCO3 = 100.09 g/mol, mm H2SO4 = 98.08 g/mol)

Answer: Solution C (7.5 M) > Solution D (0.07 M)

Solutions : 500