Order Periodicity Of Oxide Assignment
1) Oxygen is the most prevalent element on Earth.
a. Free diatomic oxygen (O2) makes up about 20% of the air by volume.
b. Water is approximately 89% oxygen by mass.
c. Oxides [MxOy] are the most abundant salts in the Earth’s crust.
2) Oxygen at room temperature is fairly unreactive; its reactivity is enhanced by increasing the temperature.
3) Pure diatomic oxygen gas can be generated by the decomposition of chlorates.
a. Our reaction: 2KClO3(s)
image1.wmf2KCl(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.
Order Periodicity Of Oxide Assignment
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:
Order Periodicity Of Oxide Assignment
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:
Order Periodicity Of Oxide Assignment
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
Order Periodicity Of Oxide Assignment
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
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