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Periodicity
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Periodicity. Patterns across the Periodic Table. Task 1. 1. NaCl MgCl 2 AlCl 3 SiCl 4 PCl 3 PCl 5 S 2 Cl 2 What is the oxidation number of the other element in these chlorides? 2. Silicon reacts with chlorine to make silicon (IV) chloride
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Periodicity
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Task 1 1. NaCl MgCl2 AlCl3 SiCl4 PCl3 PCl5 S2Cl2 What is the oxidation number of the other element in these chlorides? 2. Silicon reacts with chlorine to make silicon (IV) chloride • Write a balanced equation for the reaction • What is the change in oxidation state of silicon? • What is the change in oxidation state of chlorine? • Which substance is the oxidising agent? Explain.
Redox Reactions Allrxns of elements are redox There is a change in oxidation number (element = 0, it changes in a compound) OIL RIG LHS: metals are OXIDISED (reducing agents) RHS: non metals are REDUCED (oxidising agents)
Oxidation Reactions • Reaction with oxygen (COMBUSTION) oxygen is an oxidising agent, it oxidises the element!!!! • Chlorine is also an oxidising agent, it reacts to form chlorides