lab 12 periodicituy of oxide

2KCl(s) + 3O2(g)

b. Manganese dioxide is a catalyst implemented to increase the rate of the reaction.

4) Oxides can be classified by their acidity and basicity.

a. Basic oxides produce alkaline solutions (pH >7) and react with acids.

i. Most basic oxides are produced from reactions of metals with oxygen.

ii. Basic oxide synthesis: 2Ba(s) + O2(g) ( 2BaO(s)

iii. Basic oxide in water: BaO(s) + H2O(l) ( Ba(OH)2(aq)

b. Acidic oxides produce acidic solutions (pH <7) and react with bases.

i. Most acidic oxides are produced from reactions of non–metals with oxygen.

ii. Acidic oxide synthesis: Se(s) + O2(g) ( SeO2(s)

iii. Acidic oxide in water: SeO2(s) + H2O(l) ( H2SeO3(aq)

c. Amphoteric oxides can have properties of both acidic and basic oxides.

i. Many amphoteric oxides are produced from reactions of semi–metals with oxygen.

ii. Depending on the environment, amphoteric oxides can produce acid or basic compounds.

iii. Example:

1. Amphoteric oxide synthesis: 4Al(s) + 3O2(g) ( 2Al2O3(s)

2. Reaction of amphoteric oxide under basic conditions: Al2O3(s) + 3H2O(l) +2NaOH(aq) ( 2NaAl(OH)4(aq)

3. Reaction of amphoteric oxide under acidic conditions: Al2O3(s) + 3H2O(l) + 6HCl(aq) ( 2AlCl3(aq) + 6H2O(l)

The Reactive Elements: Aluminum (Al), Carbon Charcoal (C), Magnesium (Mg), Oxygen (O2), Sulfur (S8).

The Oxides:

1) Aluminum oxide*

2) Calcium oxide

3) Carbon dioxide*

4) Diphosphorus pentoxide*

5) Diiodine pentoxide

6) Magnesium oxide*

7) Sodium oxide

8) Silicon dioxide

9) Sulfur dioxide*

Substances to include in the Table of Chemical and Physical Properties:

The oxides

Procedure:

Please fill out the balanced equations and the data table below based on lecture video and lecture information. Please print and complete the tables. Scan the corresponding pages and attach to the prelab. Please include discussion and conclusion.

For discussion please correlate the periodic trends in the classification of the oxides. For conclusion, please correlate the Lewis structures and discuss their correlation as being acidic, basic and amphoteric.

Balanced Equations for Oxide Formation from the elements:

Balanced Equation for Aluminum Oxide Formation: _____________________________

Balanced Equation for Carbon Dioxide Formation: ______________________________

Balanced Equation for Magnesium Oxide Formation: ____________________________

Balanced Equation for Sulfur Dioxide Formation: _______________________________

Balanced Equations of Reactions of Oxides with Water:

1) Balanced Equation for Aluminum Oxide + Water: ____________________________

2) Balanced Equation for Calcium Oxide + Water: _______________________________

3) Balanced Equation for Carbon Dioxide + Water: ______________________________

4) Balanced Equation for Diphosphorus Pentoxide + Water: _______________________

5) Balanced Equation for Iodine Pentoxide + Water: _____________________________

6) Balanced Equation for Magnesium Oxide + Water: ____________________________

7) Balanced Equation for Silicon Dioxide + Water: ______________________________

8) Balanced Equation for Sodium Oxide + Water: _______________________________

9) Balanced Equation for Sulfur Dioxide + Water: _______________________________

Sample Data Table for Oxide Results – 1:

Name of Oxide	Formula	Acid, Base, or Amphoteric	Lewis Dot Structure of Oxide
Aluminum Oxide
Calcium Oxide
Carbon Dioxide
Diphosphorus Pentoxide
Diiodine Pentoxide

Sample Data Table for Oxide Results – 2:

Name of Oxide	Formula	Acid, Base, or Amphoteric	Lewis Dot Structure of Oxide
Magnesium Oxide
Silicon Dioxide
Sodium Oxide
Sulfur Dioxide

Banerjee

General Chemistry-I Lab