CHM2045 Exam 2 SI Review

Balancing Equations

100

Al + HCL -> AlCl₃ + H₂ 

 What is:

2Al + 6HCL -> 2AlCl₃ + 3H₂

200

CO₂ + H₂O -> C₆H₁₂O₆ + O₂

What is:

6CO₂ + 6H₂O -> C₆H₁₂O₆ + 6O₂

300

Fe₂(SO₄)₃ + KOH -> K₂SO₄ + Fe(OH)₃

What is:

Fe₂(SO₄)₃ + 6KOH -> 3K₂SO₄ + 2Fe(OH)₃

400

Al₂(SO₃)₃ + NaOH -> Na₂SO₃ + Al(OH)₃

What is:

Al₂(SO₃)₃ + 6NaOH -> 3Na₂SO₃ + 2Al(OH)₃

500

S + HNO₃ -> H₂SO₄ + NO₂ + H₂O

What is:

S + 6HNO₃ -> H₂SO₄ + 6NO₂ + 2H₂O

Complete and Net Ionic Equations

100

(Explain)

1. Spectator ion

2. Solubility

3. Complete Ionic vs Net Ionic Equations

What is:

1. An ion present in a chemical reaction, but does not participate.

2. The ability of a solute to dissolve in a solvent to form a solution.

3. A complete equation shows the spectator ions, while a net equation only shows the ions participating in the reaction.

200

Write the complete and net ionic equations of:

NaCl + AgNO₃ -> NaNO₃ + AgCl

What is:

Na⁺(aq) + Cl^-(aq) + Ag⁺(aq) + NO₃^-(aq)-> AgCl(s) + NO₃^-(aq) + Na⁺(aq)

&

Cl^-(aq) + Ag⁺(aq) -> AgCl(s)

300

Write the complete and net ionic equations, (which are the spectator ions):

Pb(NO₃)₂(aq)+ KI(aq) -> KNO₃(aq) + PbI₂(s)

What is:

Pb²⁺(aq) + 2I^-(aq) + 2NO₃^-(aq) + 2K⁺(aq)-> PbI₂(s) + 2K⁺(aq) + 2NO₃^-(aq)

&

Pb²⁺(aq) + 2I^-(aq) -> PbI₂(s)

400

Write the net ionic equation for the reaction of copper (II) chloride and potassium phosphate.

What is:

3Cu²⁺(aq) + 2PO₄³(aq) -> Cu₃(PO₄)₂ (s)

500

Write net ionic equation for (acid-base) reaction of calcium hydroxide and sulfurous acid.

What is:

H₂SO₃(aq) + Ca²⁺(aq) + 2OH^-(aq) -> CaSO₃(s) + 2H₂O(l)

Oxidation Numbers

100

Magnesium Chloride

Mg ion oxidation number?

What is +2

200

V₂O₅

V ion oxidation number?

What is +5

300

HSO₃^-

S ion oxidation number?

What is +4

400

K₂CrO₄

Cr ion oxidation number?

What is +6

500

Out of these compounds, which compound contains the ion with the highest oxidation number?

A. Sulfur Trioxide

B. Carbon Dioxide

C. Aluminum Chloride

D. Calcium Sulfide

What is:

A. Sulfur (x=6) in Sulfur Trioxide

Acids and Bases

100

Explain:

1. Acid Definition

2. Base Definition

3. Strong Acid vs Weak Acid

What is:

1. An acid is a substance that increases the H⁺ content when dissolved in water.

2. A base is a substance that increases the OH- content when dissolved in water.

3. A strong acid completely disassociates into ions while a weak acid does not.

200

The products of a strong acid and strong base reaction?

What is:

a salt and water

300

List all the strong acids and strong bases

What is:

HCl, HBr, HI, HNO₃, HClO₃, HClO₄, H₂SO₄

NaOH, KOH, Ba(OH)₂, LiOH, Sr(OH)₂

400

Write the net ionic equation for:

NaOH(aq) + HCl(aq) -> H₂O(l) + NaCl(aq)

What is:

H⁺(aq) + OH^-(aq)-> H₂O(l)

OR 

H₃O⁺(aq) + OH^-(aq) -> 2H₂O(l)

500

Write the complete ionic equation for:

The reaction of nitric acid and magnesium hydroxide (solid) to produce water and magnesium nitrate.

What is:

2H⁺(aq) + 2NO₃^-(aq) + Mg(OH)₂(s) -> 2H₂O(l) + Mg²⁺(aq) + 2NO₃^-(aq)

Redox Reactions

100

What occurs in a redox reaction?

What is:

One ion experiences an increase in its oxidation number, and the other ion experiences a decrease in its oxidation number 

(Reduction and Oxidation)

200

Determine which is oxidized and which is reduced, list oxidation numbers:

Fe₂O₃(s) + 2Al(s) -> Al₂O₃(s) + 2Fe(l)

What is:

Aluminum oxidized (0 to 3+)

Iron reduced (3+ to 0)

300

Determine which is oxidized and which is reduced, list oxidation numbers:

Zn + HCl -> H₂ + ZnCl₂

What is:

Zn oxidized (0 to 2+)

H reduced (1+ to 0)

400

Determine which is oxidized and which is reduced, list oxidation numbers:

The reaction of Iron and Oxygen to produce Iron (III) Oxide

What is:

Fe oxidized (0 to 3+)

O reduced (0 to 2-)

500

Determine which is oxidized and which is reduced, list oxidation numbers:

The reaction of aluminum and copper (II) chloride to produce aluminum chloride and copper

What is:

Al oxidized (0 to 3+)

Cu reduced (2+ to 0)