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Note on Copper

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Symbol: Cu
Atomic No: 29
Atomic weight: 63.57
Valency: 1 and 2
Electronic configuration: 1s2,2s2,2p6,3s2,3p6,3d10,4s1
Position in the periodic table: Copper belongs to Group IB and period 4 of the periodic table. It is a 'd' block element. It is also known as transition element.

Important ores of copper

  1. Cuprite (Ruby copper)
  2. Copper pyrite ( Chalcopyrite)
  3. Copper glance ( Chalcocite)
  4. Malachite

Properties

Physical

  1. Copper is a red brownish metal with a metallic luster.
  2. It is a good conductor of heat and electricity.
  3. Its specific gravity is 8.95.
  4. It is highly malleable and ductile in nature.
  5. Its melting point is 1083°C and its boiling point is 2562°C.

Chemical properties

Action with acids

  1. Reaction with hydrochloric acid Copper does not react with hydrochloric acid in normal condition but Copper react with the dilute hydrochloric acid in the presence of air to form cupric chloride.

    2Cu + 4HCl + O2 → 2CuCl2 + 2H2O

    Copper reacts with the concentrated hydrochloric acid, and it forms cuprous chloride and hydrogen gas.

    2Cu + 2HCl → 2CuCl + H2

  2. Reaction with sulphuric acid: Copper does not react with the sulphuric acid in normal condition but Copper reacts with the warm dilute sulphuric acid in the presence of air to producecoppersulphate and water.

    2Cu + 2H2SO4 + O2 → 2CuSO4 + 2H2O

    Copper reacts with hot and concentrated sulphuric acid to produce copper II sulphate and sulphur dioxide.

    Cu + conc. 2H2SO4 → CuSO4 + 2H2O + SO2

  3. Reaction with nitric acid : Copper reacts with hot dilute nitric acid to form copper(II)nitrate,nitricoxide and water.

    3Cu + 8HNO3 → 3Cu(NO3)2 + 4H2O + 2NO

    Copper reacts with hot concentrated nitric acid to give copper nitrate, nitrogen dioxide and water.

    Cu + conc. 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2

Uses of copper

  1. Copper is used for making electrical goods and cables.

    http://www.prestigeelectric.net/wp-content/uploads/2009/04/copper-electrical-wire.jpg

    Fig: Copper wire

    http://im-3.eefa.co/fg-copper-s3.jpg

    Fig: Copper refrigerator
  2. It is used in electroplating.

    http://www.middleschoolchemistry.com/atomsworld/wp-content/uploads/2012/08/electrochemistry1.jpg

    Fig: Copper electroplating

  3. It is used for making utensils, coins, jewelry, etc.

    http://www.asianartcreations.com/handicrafts-india/copper-utensils-kalash.jpg

    Fig: Copper utensil

    http://www.coinlink.com/News/images/1877_blay_pcgs.jpg

    Fig: Copper coin
  4. It is used in the manufacture of dyes and pesticides.

  • Copper belongs to Group IB and period 4 of the periodic table. It is a 'd' block element. It is also known as the transitional element.
  • Copper is used for making electrical goods and cables, manufacture of dyes and pesticides, make utensils, coins, jewelry, etc.
  • The properties of copper are: red brownish metal with a metallic luster, highly malleable and ductile in nature, Its melting point is 1083°C and its boiling point is 2562°C.
.

Very Short Questions

The two properties of copper that makes pots and pans are: a. Copper is malleable and ductile. b. Copper is good conductor of heat.

Copper reacts with hot dilute nitric acid to form copper nitrate,nitric oxide and water.

3Cu + 8HNO3 → 3Cu(NO3)2 + 4H2O + 2NO

Copper reacts with hot concentrated nitric acid to give copper nitrate, nitrogen dioxide and water.

Cu + conc. 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2

Copper- 1s22s22p63s23p63d104s1
Iron- 1s2 2s2 2p63s2 3p63d64s2

Copper is used to make wires because it is maliable and ductile. Copper is also used in electroplating as it resist rusting.

0%
  • The molecular formula of silver is _______.

    Ar


    Ag


    S


    Si


  • Copper belongs to Group ______.

    IB


    Zero


    IA


    VIIA


  • Copper reacts with warm dilute sulphuric acid in the presence of air to produce ______.

    cuprous chloride


    copper nitrate


    copper sulphate


    cupric chloride


  • Which one is not the ore of copper?

    Copper glance


    Argentite


    Chalcocite


    Cuprite


  • Copper reacts with dilute hydrochloric acid in the presence of air to form ______.

    cuprous chloride


    sulphur dioxide


    cupric chloride


    copper sulphate


  • The atomic number of copper is ______.

    27


    29


    28


    26


  • The correct electronic configuration of copper is ______.

    1s2,2s2,2p6,3s2,3p6


    1s2,2s2,2p6,3s2,3p6,3d11


    1s2,2s2,2p6,3s2,3p6,3d10,4s1


    1s2,2s2,2p6,3s2


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