Chemistry - Redox reactions 0.0 / 5 ? ChemistryAcids, bases and saltsGCSEAQA Created by: LunaShomeiRoseCreated on: 20-10-18 21:03 Redox is a simplified name for... Reduction and oxidation reactions 1 of 16 In these reactions, electrons ___ Move between atoms 2 of 16 Reduction is the ___ of electrons Gain 3 of 16 Oxidation is the __ of electrons Loss 4 of 16 Atom A gives an electron to atom B. At which atom is oxidation and reduction happening? A = losing electron - Oxidation. B = gaining electron - reduction 5 of 16 What word can we use to describe what happens at atom A and B? (not oxidation/reduction) A is being oxidised. B is being reduced 6 of 16 What does OIL RIG stand for? (helps remember which redox reaction is which) Oxidation Is Loss. Reduction Is Gain 7 of 16 In the reaction Na + Cl --> NaCl, which one is being oxidised/reduced? Na is oxidised(loses electrons). Cl is reduced(gains electrons) 8 of 16 (Not a question) This should help explain why reduction is gain of electrons, and not lose (reduce)... Reduction is the gaining of negative electrons. As the electrons are gained, the charge goes down (is reduced!) 9 of 16 You cannot use -(minus) in chemical reactions. So how would you write that Na gets oxidsised in the reaction Na + Cl? Na --> Na+ + e- (this makes it seem like electrons is being 'spat out' from reaction [loss]) 10 of 16 We can write 2 __ reactions for a redox reaction Half 11 of 16 Why 2? One for oxidation. One for reduction 12 of 16 If an element is by itself (e.g Cl2, S6, Na) it always has an oxidation number of __ 0 13 of 16 Monatomic ions are ions made from only one ___ Atom 14 of 16 Monatomic ions oxidation number is the same as their... Ion charge (e.g. K+ = +1) 15 of 16 Elements in group 1 always have oxidation number of... +1 16 of 16
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