c Describe the example of recycling shown on the flow chart 2 marks 2 d The air

C describe the example of recycling shown on the flow

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2 (c) Describe the example of recycling shown on the flow chart. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks) 2 (d) The air is removed from Reactor 2 . An atmosphere of argon is used for the reaction between titanium chloride and magnesium metal. Explain why. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks) Question 2 continues on the next page
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6 Do not write outside the box 2 (e) Titanium metal is produced by reacting titanium chloride with magnesium.950 kg of titanium chloride was mixed with 240 kg of magnesium metal. The mixture was heated and produced 950 kg of magnesium chloride.Calculate the mass of titanium metal produced.
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7 Do not write outside the box (07) G/K84796/Jun12/CH1HP Turn over 2 (f) The graph shows the mass of titanium metal produced from a pure rutile ore and from an impure rutile ore. 200 300 400 0 0 100 200 300 400 500 600 700 800 Impure ore Pure ore 100 Mass of titanium metal in kg Mass of rutile ore in kg 500 600 The difference between the two lines represents the amount of waste rock in the impure ore. 300 kg of titanium metal was produced from the impure ore. Calculate the mass of waste rock in the impure ore. ............................................................................................................................................ Mass = ....................................................... kg (1 mark) ____ 8
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8 Do not write outside the box (08) G/K84796/Jun12/CH1HP 3 Crude oil is used to produce poly(ethene). 3 (a) Fractional distillation is used to separate crude oil into fractions. Crude oil heated to 350 °C Naphtha fraction 3 (a) (i) Write a number, 2 , 3 , 4 or 5 , next to each stage so that the description of fractional distillation is in the correct order. Numbers 1 and 6 have been done for you. Number Stage 1 The crude oil is heated to 350 °C. When a fraction in the vapours cools to its boiling point, the fraction condenses. Any liquids flow down to the bottom of the column and the hot vapours rise up the column. 6 The condensed fraction is separated and flows out through a pipe. When the hot vapours rise up the column, the vapours cool. Most of the compounds in the crude oil evaporate. (2 marks) 3 (a) (ii) The naphtha fraction is cracked to produce ethene (C 2 H 4 ). Ethene is used to make the polymer called poly(ethene). Name two substances produced when poly(ethene) burns in air. 1 ......................................................................................................................................... 2 ......................................................................................................................................... (2 marks)
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9 Do not write outside the box 3 (b) In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate.Each year in the UK, billions of plastic bags are given free to shoppers. These bags are made from poly(ethene) and are often used only once.After being used many of these plastic bags are either thrown away as litter or buried in landfill sites.In 2006 over 10 billion of these plastic bags were given free to shoppers.In 2009 the number of plastic bags given to shoppers had decreased to 6.1 billion.One reason for the decrease was because some supermarkets made people pay for their plastic bags.From 2011 a new type of plastic shopping bag made mainly from poly(ethene) had a use-by date of only one year printed on the bag.Use the information above and your knowledge and understanding to describe advantages and disadvantages of using plastic shopping bags made from poly(ethene).............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(6 marks)____10
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