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Published byRussell Preston Modified over 10 years ago
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Fermentation Aim: To recall the chemistry of fermentation To understand that ethanol can be used as a biofuel
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Alcoholic drinks
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alcohol grapes
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Made from grain flavoured with juniper berries
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Cider made from apples
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Beer made from barley
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Vodka made from grain (rye or wheat)
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Whiskey made from barley and malted barley or rye
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Champagne made from 2 types of black grapes and a white grape.
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Alcopops - vodka
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Port made from grapes Sherry from grapes
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Brandy: made from grape wine served warm
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Tequila – Mexican - from hearts of the blue agave plants
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Sake – Japanese rice wine
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Rum – molasses or sugar cane
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Absinthe – from herbs including artemisia absinthium
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Which drink do you think contains the highest concentration of alcohol? Record in your notebook
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Alcohol content Beer5% Table Wine8 – 14% Sparkling wine 8 – 12% Fortified wine (port, sherry)17 –22% Spirits: vodka, gin, whiskey, brandy37.5 – 40% tequila
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Every year 1000 young adults aged under 15 are admitted to hospital each year with acute alcohol poisoning. Large amounts of alcohol drunk quickly on just ONE occasion can KILL.
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Grapes and grains contain carbohydrates Starch or Sugar These ferment to give ethanol and carbon dioxide
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Fermentation Lime water Yeast + glucose + water at 37 o C Glucose ethanol + carbon dioxide yeast C 6 H 12 O 6 2C 2 H 5 OH + 2CO 2 Copy into your notes
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Fractional Distillation Ethanol is extracted from an ethanol/water mixture by distillation. The mixture is heated to boiling and the ethanol boils first at 78 o C. Draw the apparatus
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Biofuels The ethanol produced by fermenting plant material (biomass) may be used as a fuel. http://www.bbc.co.uk/radio4/science/rams/costingtheearth.ram
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Complete the sentence ‘Today I have learnt: Discuss with the person next to you
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Homework Research the effect of alcohol on the body including reaction time Display as a poster (For Friday)
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