Chemistry (Formula of Ionic Compunds)

Completed the table in the picture.

Math Test on 20 Feb 09! Reminder!!!

Topics covered will be Vectors (Worksheet A and B)
Study for it. You can do it if you want to.

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Redox Reactions

Answer all the questions

1. Complete the following:

(i) Oxidation is the loss of _____________ or the ________ of oxygen.

(ii) Reduction is the loss of _____________ or the ________ hydrogen.

2. For each of the following reactions, explain which substance is oxidized and which substance is reduced?

(a) Fe2O3 + 3CO  2Fe + 3CO2

_______________ is oxidized.

Reason: ____________________________________________________

___________________________________________________________

_______________ is reduced.

Reason: ____________________________________________________

___________________________________________________________


(b) 4HCl + MnO2  MnCl2 + Cl2 + 2H2O

_______________ is oxidized.

Reason: ____________________________________________________

___________________________________________________________

_______________ is reduced.

Reason: ____________________________________________________

___________________________________________________________

Balance these equations

18 Feb 2009

1. ___ Cu(s) + ___ O2(g) --> ___ CuO(s)

2. ___ H2O(l) --> ___ H2(g) + ___ O2(g)

3. ___ Fe(s) + ___ H2O(g) --> ___ H2(g) + ___ Fe3O4(s)

4. ___ Fe2O3(s) + ___ H2(g) --> ___ Fe(s) + ___ H2O(l)

5. ___ CaCO3(s) --> ___ CaO(s) + ___ CO2(g)

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