Chemical Bonding Worksheet

Chemical Bonding Worksheet

Chemistry   12:01

Do these following questions in your exercise book. Submit it on Thursday October 2, 2014


1. What type of bond would be found between the following pairs of elements?
     (a) sulfur and chlorine
     (b) carbon and oxygen
     (c) magnesium and nitrogen
     (d) zinc and copper
2. what force holds the sodium and chlorine together in sodium chloride?
3. Draw diagrams of the covalent bonding in the following elements and compounds (show the outer electrons only in your diagram)
    (a) hydrogen
    (b) fluorine gas
    (c) water
4. Draw diagrams the ionic bonding in the following compounds
    (a) lithium fluoride
    (b) barium oxide
    (c) aluminum chloride

IGCSE Chemistry: ELECTROLYSIS OF ALUMINIUM

IGCSE Chemistry: ELECTROLYSIS OF ALUMINIUM

IGCSE Chemistry   14:29

Th e diagram shows the electrolysis of alumina (aluminium oxide) purifi ed from bauxite.

1 a What is the formula for aluminium oxide?

   b What ions are present in aluminium oxide?

   c What is the purpose of the cryolite in the process?

2 Write down half-equations for the processes occurring during electrolysis at:

    a the anode:

    b the cathode:

3 Complete the two statements.

    a Oxidation ( of electrons) occurs at the .

    b Reduction ( of electrons) occurs at the .

4 Th e graphite anodes have to be replaced regularly. Why is this?

5 Why is it so much more cost-eff ective to recycle aluminium than to extract new aluminium?