CHAPTER 2 REACTIVITY SERIES SEMESTER 1

GOLD

.

SILVER

Reactivity series

Reaction of metals and water.

REDUCTION OF OXIDES OF METALS WITH CARBON

nitrate

COPPER MALACHITE

ORE MINING
.

 

TYPES OF STEEL

LOW CARBON (LESS THAN 0.3 PERCENTAGE)  CAR BODIES

      
      MEDIUM CARBON ( 0.3  TO 0.9 PERCENTAGE )  RAILWAY TRACKS

   HIGH CARBON   ( 0.9  TO 1.5  PERCENTAGE )   KNIVES.
      

 

CHEMICAL EQUATIONS IN EXTRACTION OF ZINC.
 2ZnS +  3O2    -----   2SO2  +  2ZnO

ZnO  + CO ------   Zn +  CO2

EXTRACTION OF ALUMINIUM

QUESTIONS

1.Why cryolite is used in the extraction of aluminium?

2.Write the half equation for the formation of aluminium atoms from aluminium ions.

zinc

1.In making alloy brass (Copper and Zinc)
2.In Galvanising .

Galvanising is the process of covering iron with zinc , to protect  iron  from rusting.Zinc is more reactive  so it reacts and it  prevents  iron from rusting.
METHODS  FOR PREVENTING RUSTING

• Oiling 
• Greasing  
• Painting 

    Galvanising 
    Sacrificial anodic protection




QUESTIONS

1. What conditions are necessary for iron to rust?
2. What is the disadvantage  of using grease to prevent the rusting of iron ?

http://www.bbc.co.uk/schools/gcsebitesize/science/aqa_pre_2011/rocks/metalsrev7.shtml

http://www.chemguide.co.uk/inorganic/extraction/introduction.html

http://chemwiki.ucdavis.edu/Inorganic_Chemistry/Descriptive_Chemistry/Elements_Organized_by_Block/3_d-Block_Elements/1b_Properties_of_Transition_Metals/Metallurgy/An_Introduction_to_the_Chemistry_of_Metal_Extraction