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Redox

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Across
1.Oxygen in compounds is assigned an oxidation number of -2 except in a
4.Chemically uncombined elements are assigned an oxidation number of _________
6.A reaction is not_______if there is no reduction and oxidation.
8.The oxidation number of a specie that consists a_____ion equal to the charge on that ion.
9.The loss of electrons is reffered to as________
11.The alkaline _______in a compound are always assigned an oxidation number of +2
15.Cl2 + 2Fe2-> 2Cl- + 2Fe3+: In this equation iron (II) acts as the______
16.Half-ionic equations always contain_______.
17._________ peroxide can be both an oxidising and reducing agent
18.Elements in their_______state have an oxidation number of zero.
20.Whenever a fuel is burnt, the carbon is _______.
21.When oxidised this specie may change from (+2) to( +3).
23.The reaction of photosynthesis is _______-in relation to that of respiration
26.The____ metals in a compound have an oxidation number of +1
27.In a reaction between Cl2 and NaI the resulting colour is ________
28.Carbon in C6H12O6 is assigned an oxidation number of_________.
29.In a reaction between Cr2O72- and Fe2+ the resulting colour is_______
30.In a reaction between KMnO4 and Fe2+ , permanganate goes from______to colourless
Down
2.Chlorine is a very powerful_______agent.
3.The iodide ion is a_______ agent.
5.In PO43-, phosphorus’ oxidation number is plus_________
7.When writing an ionic equation, you must remove the ____ ions.
8.In any given redox reaction, oxidation and reduction occurs________
10.In a compound______is always assigned +3
12.Sulphuric acid is used to_______ some oxidizing agents
13.The oxidation number of a specie becoming more negative is called____
14.__________ In compounds is always given an oxidation number of -1
19.In the reaction of iron (ii) and chlorine, chlorine is acting as the____
22.The _____on a complex ion is the sum of the oxidation numbers of the species in that ion.
24.An oxidising agent itself is__________
25.When bleach is added to Fe(II) solution, it went from colourless to ____.

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