oxygen ais one of the essential elements necessary for life

Oxygen• a Is one of the essential elements necessary for life

Oxygen• a Is one of the essential elements necessary for life

• b Makes up over half the earth’s crust by mass

Oxygen• a Is one of the essential elements necessary for life

• b Makes up over half the earth’s crust by mass

• c Occurs in the hydrosphere , lithosphere, and atmosphere• litho – with Si, Al, and others

• hydro – in water as H2Oto form the earth’s crust

• atmo – as O2 we breath and Ozone O3 to protect

Oxygen• a Is one of the essential elements necessary for life

• b Makes up over half the earth’s crust by mass

• c Occurs in the hydrosphere , lithosphere, and atmosphere• litho – with Si, Al, and others

• hydro – in water as H2Oto form the earth’s crust

• atmo – as O2 we breath and Ozone O3 to protect

• d 2/3 of our body weight is Oxygen

Oxygen• a Is one of the essential elements necessary for life

• b Makes up over half the earth’s crust by mass

• c Occurs in the hydrosphere , lithosphere, and atmosphere• litho – with Si, Al, and others

• hydro – in water as H2Oto form the earth’s crust

• atmo – as O2 we breath and Ozone O3 to protect

• d 2/3 of our body weight is Oxygen

• e Combined with the food we eat to produce energy

Oxygen• a Is one of the essential elements necessary for life

• b Makes up over half the earth’s crust by mass

• c Occurs in the hydrosphere , lithosphere, and atmosphere• litho – with Si, Al, and others

• hydro – in water as H2Oto form the earth’s crust

• atmo – as O2 we breath and Ozone O3 to protect

• d 2/3 of our body weight is Oxygen

• e Combined with the food we eat to produce energy

• f 20 billion Kg is produce annually in the United States

Oxygen• a Is one of the essential elements necessary for life

• b Makes up over half the earth’s crust by mass

• c Occurs in the hydrosphere , lithosphere, and atmosphere• litho – with Si, Al, and others

• hydro – in water as H2Oto form the earth’s crust

• atmo – as O2 we breath and Ozone O3 to protect

• d 2/3 of our body weight is Oxygen

• e Combined with the food we eat to produce energy

• f 20 billion Kg is produce annually in the United States

• g Causes rust an corrosion

Oxygen• a Is one of the essential elements necessary for life

• b Makes up over half the earth’s crust by mass

• c Occurs in the hydrosphere , lithosphere, and atmosphere• litho – with Si, Al, and others

• hydro – in water as H2Oto form the earth’s crust

• atmo – as O2 we breath and Ozone O3 to protect

• d 2/3 of our body weight is Oxygen

• e Combined with the food we eat to produce energy

• f 20 billion Kg is produce annually in the United States

• g Causes rust an corrosion

• h Primary cause for the spoilage of food

Oxygen• a Is one of the essential elements necessary for life

• b Makes up over half the earth’s crust by mass

• c Occurs in the hydrosphere , lithosphere, and atmosphere• litho – with Si, Al, and others

• hydro – in water as H2Oto form the earth’s crust

• atmo – as O2 we breath and Ozone O3 to protect

• d 2/3 of our body weight is Oxygen

• e Combined with the food we eat to produce energy

• f 20 billion Kg is produce annually in the United States

• g Causes rust an corrosion

• h Primary cause for the spoilage of food

• I Causes wood to decay

I Causes wood to decay

When Oxygen reacts with a metal, we form the metal oxide

Ti + O2 TiO2

Ca + O2 CaO2

When we burn something, we siply add oxygen (oxidize It)

C3H8 + O2 3CO2 + 4H2O

HYDROGEN

• a By weight, it is 0.9% of the earth crust

HYDROGEN

• a By weight, it is 0.9% of the earth crust

• b By #, it makes up 15 % of the earth crust

HYDROGEN

• a By weight, it is 0.9% of the earth crust

• b By #, it makes up 15 % of the earth crust

• c Usually found combined with water or hydrocarbons

HYDROGEN

• a By weight, it is 0.9% of the earth crust

• b By #, it makes up 15 % of the earth crust

• c Usually found combined with water or hydrocarbons

• d It is colorless and odorless

HYDROGEN

• a By weight, it is 0.9% of the earth crust

• b By #, it makes up 15 % of the earth crust

• c Usually found combined with water or hydrocarbons

• d It is colorless and odorless

• e It is the lightest of all substances

HYDROGEN

• a By weight, it is 0.9% of the earth crust

• b By #, it makes up 15 % of the earth crust

• c Usually found combined with water or hydrocarbons

• d It is colorless and odorless

• e It is the lightest of all substances

• f There is 200 million Kg produced in the US yearly

HYDROGEN

• a By weight, it is 0.9% of the earth crust

• b By #, it makes up 15 % of the earth crust

• c Usually found combined with water or hydrocarbons

• d It is colorless and odorless

• e It is the lightest of all substances

• f There is 200 million Kg produced in the US yearly

• g 2/3 of this amount is used to produce ammonia

• 2H2 + O2 H2O

HYDROGEN

• a By weight, it is 0.9% of the earth crust

• b By #, it makes up 15 % of the earth crust

• c Usually found combined with water or hydrocarbons

• d It is colorless and odorless

• e It is the lightest of all substances

• f There is 200 million Kg produced in the US yearly

• g 2/3 of this amount is used to produce ammonia

• h not used in blimps anymore

• 2H2 + O2 H2O

Oxidation / Reduction

Oxidation – The gain of oxygen atoms

Reduction – The loss of oxygen atoms

2Mg + O2 2MgO

RhO2 RhO + O2

Oxidation / Reduction

Oxidation – The loss of hydrogen atoms

Reduction – the gain of hydrogen atoms

C2H6O C2H4O + H2

FeO2 + H2 FeH2O2

Oxidation / Reduction

Oxidation – the loss of electrons

Reduction – the gain of electrons

Ag Ag2+

Cr2+ Cr

Ca + Mg2+ Ca2+ + Mg

OIL RIG

oxidation involves loss

reduction involves gain

Any oxidation is accompanied by a reduction

FeO + H2 Fe + H2O