AQA AS Level Unit 2 Section 2 Group 7 - the halogens - trends, solubility, test ion, required practical 4, halide ions, oxidising and reducing ability
Using the specification and books
No exam questions are included due to copy right
Including:
Homework booklets
Assessment sheets
Interactive powerpoints (rarely seen in A-level)
RSC STARTER FOR 10 CAN BE FOUND ON RSC WEBSITE
Group 7: The Halogens (A large number of practicals contained within - can be spread over 5 lessons)
Unit 2 Section 2: 3.2.3.1 Trends in properties and 3.2.3.2 Uses of chlorine and chlorate(I)
LESSON 1: PHysical and Chemical properties
Objectives:
To recap the trends of group 7 elements: atomic radius, electronegativity and melting point
To recap halogen displacement reactions from GCSE
To understand the trends in oxidising ability of the halogens (displacement reactions)
LESSON 2: Reducing abilities of Halogens
To understand how halide ions are formed
To understand the reducing ability of halide ions
To complete a practical to show the reducing power of halides illustrated by reactions of concentrated sulfuric acid
LESSON 3:
Objectives:Use of acidified silver nitrate to identify halide ions
To know how that halide ions are identified by using silver nitrate
To understand the trends in solubilities of the silver nitrates in ammonia
To complete a practical to test for halide ions using acidified silver nitrate, including the use of ammonia to distinguish the silver halides formed
LESSON 4: Required practical 4: L4–A-level Chemistry exemplar for required practical No. 4:
To carry out simple test-tube reactions in aqueous solution to identify cations (Group 2, NH4+) and anions (Group 7 (halide), OH-, CO32-, SO42-).
Objectives:
To recap the ways to identify positive and negative ions
To complete a series of test tube reactions to identify some anions and cations
To evaluate and consolidate
LESSON 5: Uses of Chorine + Chlorate (I)
Objectives:
To know the reactions of chlorine with water
To know the reaction of chlorine with sodium hydroxide and the use of this reaction
To evaluate the advantages and disadvantages of adding chemicals to water
Homework booklet with answers
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