Final Review: Conceptual Ch. 6 - 11

Chapter 6

100

Directions: Arrange the following elements in order of increasing electronegativity

1. Aluminum, Neon, Oxygen, Sulfur

2. Fe, Zr, Ni, Ti

1. Neon, Aluminum, Sulfur, Oxygen

2. Zr, Ti, Fe, Ni

200

Draw the Lewis Structures for:

1. OH^-

2. Ammonium

:)

300

Give the electron geometry and molecular geometry of:

1. HCN

2. NI₃

1. HCN

~EG:Linear; MG:Linear

2. NI₃

~EG:Tetrahedral; MG:Trigonal pyramidal

400

Give the electron geometry and molecular geometry of:

1. BeF₂

2. BH₂^-

1. BeF₂

~EG:Linear; MG:Linear

2. BH₂^-

~EG:Trigonal planar; MG:Bent

500

Give the electron geometry and molecular geometry of:

1. BrO₃^-

2. AlH₃

1. BrO₃^-

~EG:Tetrahedral; MG:Trigonal pyramidal 

2. AlH₃

~EG: Trigonal planar; MG: Trigonal planar

Chapter 7

100

How many sigma and pi bonds does this compound contain?

Sigma: 2

Pi: 1

200

Determine the number of sigma and pi bonds in this compound.

Sigma: 6

Pi: 3

300

Determine the hybridization of Be in BeF₂

sp

400

Determine the hybridization of SF₆

sp³d²

500

What is the hybridization of H₃O⁺?

sp³

Chapter 8

100

Balance the reaction: Al + HCl --> H₂ + AlCl₃

2 Al + 6 HCl --> 3 H₂ + 2 AlCl₃

200

Balance the reaction: Na₃PO₄ + CaCl₂ --> NaCl + Ca₃(PO₄)₂

2 Na₃PO₄ + 3 CaCl₂ --> 6 NaCl + 1 Ca₃(PO₄)₂

300

Write the balanced combustion reaction when O₂ reacts with:

1. C₃H₈

2. C₆H₁₄

1. C₃H₈ + 5 O₂ ---> 3 CO₂ + 4 H₂O

2. 2 C₆H₁₄ + 19 O₂ ---> 12 CO₂ + 14 H₂O

400

Balance the equation: Cu + HNO₃  →  Cu(NO₃)₂ + NO + H2O

3 Cu  +  8 HNO₃  →  3 Cu(NO₃)₂  +  2 NO  +  4 H₂O

Chapter 9

100

Give the formula of: 

1. Carbonic acid

2. Cobalt (II) Hydroxide

Give the name of: 

1. H₂SO₃

2. HCN

1. H₂CO₃

2. Co(OH)₂

-

1. Sulfurous acid

2. Hydrocyanic acid

200

Predict the products for the chemical equation below: (remember to balance!)

1. Na₃PO₄ (aq) + CaCl₂ (aq) -->

2. Fe(NO₃)₃ (aq) + NaOH (aq) -->

1. 2 Na₃PO₄ (aq) + 3 CaCl₂ (aq) --> 6 NaCl (aq) + Ca₃(PO₄)₂ (s)

2. Fe(NO₃)₃ (aq) +  3 NaOH (aq) -->  Fe(OH)₃ (s) + 3 NaNO₃ (aq)

300

Using the below chemical equation, give:

1. Balanced molecular equation

2. Balanced complete ionic equation

3. Balanced net ionic equation

3 CaCl₂ (aq) + 2 Na₃PO₄ (aq) --> Ca₃(PO₄)₂ (s) + 6 NaCl (aq)

3 Ca²⁺ (aq) + 6 Cl^- (aq) + 6 Na⁺ (aq) + 2 PO₄^3- (aq) --> Ca₃(PO₄)₂ (s) + 6 Na⁺ (aq) + 6 Cl^- (aq)

3 Ca²⁺ (aq) + 2 PO₄^3- (aq) --> Ca₃(PO₄)₂ (s)

400

Using the below chemical equation, give:

Al₂(SO₄)₃ (aq) + BaCl₂ (aq) -->

1. Balanced molecular equation

2. Balanced complete ionic equation

3. Balanced net ionic equation

Al₂(SO₄)₃ (aq) + 3 BaCl₂ (aq) --> 2 AlCl₃ (aq) + 3 BaSO₄ (s)

2 Al³⁺ (aq) + 6 Cl^- (aq) + 3 Ba²⁺ (aq) + 3 SO₄^2- (aq) --> 2 Al³⁺ (aq) + 6 Cl^- (aq) + 3 BaSO₄ (s)

Ba²⁺ (aq) + SO₄^2- (aq) --> BaSO₄ (s)

500

Identify the element being oxidized and reduced in the chemical equation: 

1. Cr⁺ + Sn⁴⁺  Cr³⁺ + Sn²⁺

2. 3 Hg²⁺ + 2 Fe (s)  3 Hg₂ + 2 Fe³⁺

1. Cr⁺ : Oxidized; Sn⁴⁺ : Reduced

2. Hg²⁺: Reduced; Fe: Oxidized

Chapters 10/11

100

Differentiate between exothermic and endothermic processes. 

Exothermic

1. Negative ΔH

2. Releases heat

Endothermic

1. Positive ΔH

2. Requires heat

200

How can you achieve a higher density of a gas? (Change what two things?)

1. Lower the temperature

2. Raise the pressure

300

Calculate the overall ΔH for H₂SO₄(l) → SO₃(g) + H₂O(g) using the following equations:

H₂S(g) + 2 O₂(g) → H₂SO₄(l)     ΔH = –235.5 kJ 

H₂S(g) + 2 O₂(g) → SO₃(g) + H₂O(l)     ΔH = –207 kJ 

H₂O(l) → H₂O(g)     ΔH = 44 kJ 

ΔH = 73 kJ

400

Calculate the overall ΔH for CO2(g) → C(s) + O2(g) using the following equations: 

H₂O(l) → H₂(g) + ½ O₂(g)        ΔH = 643 kJ 

C₂H₆(g) → 2 C(s) + 3 H₂ (g)     ΔH = 190.6 kJ 

2 CO₂(g) + 3 H₂O(l) → C₂H₆(g) + ⁷/₂ O₂(g) ΔH = 3511.1 kJ

ΔH = 886 kJ