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chistry - Education Scotland

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Chemistry

Everyday Chemistry

8175

.

Autumn 2000

    HIGHER STILL

    Chemistry

    Everyday Chemistry

    Intermediate 1 / Access 3

Support Materials

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Acknowledgement

The materials in this pack have been produced in partnership with Shell Education and

Glasgow City Council. The Higher Still Development Unit is grateful for this support.

INTRODUCTION

    These materials for Chemistry have been developed as part of the Higher Still Development Programme to support the learning and teaching of Unit 2, Everyday Chemistry, at Access 3/Intermediate 1 levels.

The materials consist of:

     a set of activity sheets

     a set of summary sheets (to follow in a separate pack)

     a teacher/lecturer guide

     a resource list.

Activity sheets

    The activity sheets are intended to promote the essential knowledge and understanding and to help students to develop both problem-solving and practical skills. In addition, attention is given to improving core skills, e.g. literacy and numeracy, and it is hoped that teachers/lecturers will ensure that students make use of a range of resources relating to Information and Communication Technology.

Two codes are used in the activity sheets:

Note

    These sheets are designed as non-consumable and it is expected that students answer the questions on separate paper.

Complete

    These sheets are designed to be retained by students on completion.

    A student who correctly completes the questions in all of the activity sheets will have a suitable record of the knowledge and understanding required for examination purposes leaving teachers/lecturers to decide the most appropriate way to use the summary sheets.

    Although activity sheets have been written to cover all content statements and for the development of problem-solving skills, staff will likely wish to be selective in order to keep to time-lines for the completion of the units and the course.

Teacher/lecturer guide

    As well as providing background information, the teachers’/lecturers’ guide shows the content statements covered by each sheet and also which sheets are designed to develop problem-solving skills. Reference is also made to the Prescribed Practical Activities in the support pack produced by the Higher Still Development Unit.

Chemistry: Everyday Chemistry Student Activity Sheets (Int 1) 1

Safety

    Since most of the experiments in the activity sheets will be familiar, teachers/lecturers should be aware of the safe practice to be followed. However, staff are advised that it is their responsibility to take notice of employers’ regulations with regard to health and safety. Where necessary, prior to using chemicals, the relevant entries in the Hazardous

    Chemicals Manual (SSERC) either as hard copy or in the CD-ROM version, can be

    consulted.

Chemistry: Everyday Chemistry Student Activity Sheets (Int 1) 2

2.1.1 In the Earth's crust

    Metallic elements are to the left of the zig-zag line in the Periodic Table. A few metals are found uncombined in the Earth’s crust, e.g. copper, gold and silver. These metals are found as the metal alone.

    Most metals are found combined with other elements in compounds. Compounds from which useful metals can be obtained are called ores.

    Look at the samples of ores.

    Find out which elements are in each ore.

Complete

    Now complete the table.

Common name of ore Chemical name Symbols for elements

    present

Chemistry: Everyday Chemistry Student Activity Sheets (Int 1) 1

2.1.2 Obtaining metals - heating with carbon

    Most of the metals which we need for everyday things have to be obtained from their ores.

This process is called extraction.

    Some metals can be extracted by heating the ore with carbon.

    copper ore

     and

     carbon

    plunge into

    cold water

    HEAT

    When a metal oxide is heated with carbon, the oxygen combines with the carbon to make carbon dioxide.

Your teacher will have shown you how to obtain a metal

    from its ore by heating with carbon.

Notes

    a) Describe with the help of a diagram how to obtain a metal from a metal oxide ore.

    b) Write a word equation for the reaction.

Chemistry: Everyday Chemistry Student Activity Sheets (Int 1) 2

2.1.3 The Blast Furnace

    Iron is one of the most important metals. It is needed to make steel. Iron can be extracted from its ore by heating with carbon in the Blast Furnace.

     _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

     _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

    gas outlet

    heat resistant brick lining

    C FeO(s);3CO(g)2Fe(l);3CO(g)232

    B CO(g);C(s)2CO(g)2

    A C(s);O(g)CO(g)22

    heated air blast

    _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

    Look at a suitable resource to find out about the Blast Furnace.

Complete

    a) Complete the labels on the diagram of a Blast Furnace to show what is loaded in at the

    top and what is produced at the bottom.

    b) Suggest why the furnace called a Blast Furnace.

    c) Write word equations for the reactions taking place at A, B and C.

    A. ________________________________________________________________

    B. ________________________________________________________________

    C. ________________________________________________________________

Chemistry: Everyday Chemistry Student Activity Sheets (Int 1) 3

2.1.4 Obtaining metals - using electricity

    Many metals cannot be extracted from their ores by heating with carbon. They are obtained by breaking up the compound using electricity.

    Carry out this experiment to find out more about breaking up compounds using electricity.

    battery

    carbon electrodes

    copper chloride

    solution

    Set up the circuit shown.

    Observe what is formed at the negative electrode.

Notes

a) Draw a labelled diagram of the apparatus.

    b) What form of energy is used to break up the compound?

c) i) What is formed at the negative electrode?

    ii) How is this product identified?

    Use suitable resources to find out how aluminium is extracted

    from its ores.

Notes

    d) Briefly describe how aluminium is extracted from its ores. Chemistry: Everyday Chemistry Student Activity Sheets (Int 1) 4

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