01:51 Syllabus/Unit Code: C2 CHEMICAL RESOURCES Lesson number: L03 Lesson Title: The extraction and purification of copper Learning OutcomesHow I didTargets Learning Outcome 1: To be able to extract copper from its ore. Grade C I am working at grade.....because I can move up to grade…... by ……………………… ………………… Learning Outcome 2: To know how copper is purified. Grade B I am working at grade.....because I can move up to grade…... by ……………………… ………………… Learning Outcome 3: To be able to discuss the above processes in terms of oxidation and reduction, using symbol equations. Grade A/A* I am working at grade.....because I can move up to grade…... by ……………………… ………………… Connector: Answer in full sentences 1.What happens when most metal carbonates are heated? 2.What name is given to this process? 3.How could you identify the gas that is made? 4.Write the word and symbol equation for the reaction that would happen if copper carbonate was heated.

1.Metal carbonates decompose to give the metal oxide and carbon dioxide. 2.Thermal decomposition 3.Limewater turns milky when CO 2 is bubbled through it. 4.

01:51 Extended Learning Research information and Collect Secondary data on: –What is an alloy? –Give the composition, properties and uses of the following alloys: –amalgam, brass, bronze, solder and nitinol –Photos and diagrams as appropriate. –For each site you use, include its URL (web address) in a list at the end of your research. This is your list of references. or Homework sheet - Homework task HC2.6.1 Due date: Next lesson Research Report Criteria (6 marks total = Grade A): 1) Range of different reliable sources used and references included (books/internet/survey etc), 2) Information written in own words 3) Clear and logical structure to research report including pictures/diagrams which have been referenced 4) No evidence of copy and paste!

01:51 BIG picture What skills will you be developing this lesson? Scientific Investigation- by Research and collecting secondary data, planning and collecting primary data, Analysis and Evaluation. Numeracy- by using formulae in calculations Literacy- by writing well structured sentences and paragraphs ICT- by using Laptops and electronic resources Personal skills- team work, leadership Thinking and Learning- organisation, logic, participation, memory, exploration, creativity, judgement, planning, practice. Reflection- through self or peer assessment of each Learning Outcome Key Question: Quick Discussion: What do you already know? How is this lesson relevant to every day life?

01:51 Keywords: oxidation reduction electrolysis electrolyte electrode cathode anode Here are some of the words we will be using this lesson… 1) Create sentences which use the keywords correctly. 2) Put your hand up if there is any key word from the list that you don’t know the meaning of.

01:51 New Information for Learning Outcome 1 Explore and Discover: Visual: Audio: Kinaesthetic:

01:51 Learning Activities for Outcome 1 The extraction of copper from its ore. Malachite Malachite contains copper carbonate and easily breaks down to form copper oxide Copper is then extracted by heating the copper oxide with carbon. This works because carbon is more reactive than copper. Copper containing impurities is produced. impure copper Copper comes from minerals in the Earth

Experiment - The extraction of copper from its ore. Part one Put about 3g of copper carbonate powder into a boiling tube. Adjust the Bunsen burner flame so that the air hole is half-open. Holding the test tube using the test tube holder, heat it gently until the contents turn black and stop rising. Let the tube cool down. You must wear eye protection

Part two Carefully tip the black product into the crucible. Add about 0.5 g of carbon powder and mix well. Put the lid on. Put the crucible on the pipe clay triangle and heat it strongly from below for about five minutes. Turn the Bunsen burner off. Allow the crucible to cool for several minutes. Tip the contents of the crucible into the beaker of water. Stir briefly, then let the solid contents settle. Carefully pour off the water. Add more water, stir, and allow the solid contents to settle as before. Carefully pour off the water Repeat step 5 until the water no longer contains black bits. Examine the solid at the bottom of the beaker and record its appearance. Experiment - The extraction of copper from its ore. You must wear eye protection Draw a labelled diagram. Write the word and symbol equations for this reaction.

copper(II) oxide + carbon copper + carbon dioxide 2CuO (s) + C (s) 2Cu (s) + CO 2(g)

01:51 Create Evaluate Analyse Apply Understand Remember Apply (C) I can follow instructions to extract copper from its ore. Understand (D) With help I can extract copper from its ore. Analyse (B) I can write balanced symbol equations for the extraction of copper. Demonstrate your Learning for Outcome 1 To be able to extract copper from its ore.

01:51 Learning Outcome 1: Review Learning OutcomeHow I didTargets Learning Outcome 1: Grade C I am working at grade.....because I can move up to grade…... by …………………… …………………… Go back to your Learning Outcome grid and fill out the ‘How I did’ and the ‘Targets’ column. To be able to extract copper from its ore.

01:51 New Information for Learning Outcome 2 Explore and Discover: Visual: Audio: Kinaesthetic:

01:51 Learning Activities for Outcome 2 Demonstration - Using electrolysis to purify copper.

Understanding electrolysis – Key words Electrolysis uses electricity to separate an ionic compound into its elements. Electrolyte is the liquid that is used in electrolysis. Electrode is the conducting rod used in electrolysis. Anode is the positive electrode. Cathode is the negative electrode.

Understanding electrolysis – How it works.

Using electrolysis to purify copper - Summary Copper dissolves off of the impure anode: and is deposited onto the pure cathode: The impurities are valuable and are collected, so that silver and gold can be extracted from them.

01:51 Create Evaluate Analyse Apply Understand Remember Apply (C) I can Model the reactions at the electrodes. Understand (D) I can Explain how copper is purified by electrolysis Analyse (B) I can List the stages in the purification of copper including writing the symbol equations for the reactions at the electrodes. Demonstrate your Learning for Outcome 2 To know how copper is purified.

01:51 Learning Outcome 2: Review Learning OutcomeHow I didTargets Learning Outcome 2: Grade B I am working at grade.....because I can move up to grade…... by …………………… …………………… Go back to your Learning Outcome grid and fill out the ‘How I did’ and the ‘Targets’ column. To know how copper is purified.

01:51 New Information for Learning Outcome 3 Explore and Discover: Visual: Audio: Kinaesthetic:

01:51 Learning Activities for Outcome 3 Oxidation and reduction OXIDATION - loss of electrons or increase in oxygen.OXIDATION - loss of electrons or increase in oxygen. REDUCTION - gain of electrons or decrease in oxygenREDUCTION - gain of electrons or decrease in oxygen OIL RIG Oxidation Is Loss Reduction Is Gain OF ELECTRONS Starting from malachite look at the stages in the extraction and purification of copper and identify those involving oxidation or reduction. Explain your answers.

Thermal decomposition not a redox reaction. 1.Malachite is heated.

2.Copper(II) oxide and carbon are mixed and heated. copper(II) oxide + carbon copper + carbon dioxide 2CuO (s) + C (s) 2Cu (s) + CO 2 (g) This is a REDOX reaction. Carbon is oxidised by gaining oxygen to form carbon dioxide. Copper (in CuO) is reduced* by losing oxygen to form copper metal. *copper has changed from Cu 2+ (in CuO) to Cu and so has gained electrons: Cu 2+ (s) + 2e - Cu (s)

3.Using electrolysis to purify copper Copper dissolves off of the impure anode: and is deposited onto the pure cathode: This is a REDOX reaction. electrons gained so - REDUCTION electrons lost so - OXIDATION

01:51 Create Evaluate Analyse Apply Understand Remember Apply (C) I can Identify oxidation and reduction reactions Analyse (B) I can List the stages in the extraction and purification of copper including writing the symbol equations for all the reactions. Evaluate (A) I can Prove that the extraction and purification of copper involves redox reactions. Demonstrate your Learning for Outcome 3 To be able to discuss the above processes in terms of oxidation and reduction, using symbol equations.

01:51 Learning Outcome 3: Review Learning OutcomesHow I didTargets Learning Outcome 3: Grade A/A* I am working at grade.....because I can move up to grade…... by …………………… …………………… Go back to your Learning Outcome grid and fill out the ‘How I did’ and the ‘Targets’ column. To be able to discuss the above processes in terms of oxidation and reduction, using symbol equations.

01:51 Review Swap books with the person next to you and look over their work. Write a WWW and EBI statement. Stand up if you have developed some skills this lesson? What are they? Tell the person next to you three things you have learnt this lesson. Did you successfully complete tasks at your target grade? If not, what do you need to do next in order to meet your target grade? Record this in your diary to be done as part of your extended learning at home. Is there any part of the lesson you think you need to go over again next lesson? How will you remember what you have learned today for your exam?

Experiment - The extraction of copper from its ore. per group 250 cm3 beaker Bunsen burner Crucible and lid Heatproof mat Pipeclay triangle Two spatulas Splints Stirring rod Boiling tube Test tube holder Test tube rack Tripod 3g Powdered copper carbonate (Harmful.) 0.5g Powdered carbon Demonstration - Using electrolysis to purify copper. large beaker copper sulphate solution copper electrodes croc clips wires power pack