Chemisty 0.0 / 5 ? ChemistryEmulsifiersGCSEOCR Created by: ChloeGentleCreated on: 29-03-14 17:19 Name the 4 additives in taht can be put in foods Food colors, flavor enhancers, antioxidants and emulsifiers 1 of 26 whats a food colour makes food more appetising 2 of 26 what is flavour enhancer makes food smell and taste better 3 of 26 what is an antioxidant helps food last longer 4 of 26 what is an emulsifier helps oil and water to mix 5 of 26 give 2 examples of where an emulsifier could be used mayonnaise, icecream or salad cream 6 of 26 explain the structure of an emulsifier molecule hyrophobic tail, hydrophlic head 7 of 26 whats hydrophobic water hating, oil loving 8 of 26 whats hydrophilic water loving, oil hating 9 of 26 how does an emulsifier make an emulsion hydrophobic tail bonds to oil molecules, hydrophilic head bonds with water molecules 10 of 26 what type of change is cooking irreversible chemical change 11 of 26 what happens to protein when its cooked its denatured 12 of 26 what do potatoes contain that we cant digest cellulose 13 of 26 What is cellulose The rigid cell wall on a potato 14 of 26 How do we break down cellulose by cooking it, it ruptures the cell walls 15 of 26 what happens when you heat baking powder it undergoes thermal decomposition 16 of 26 word equation for thermal decomposition sodium hydrogencarbonate ->sodium carbonate+carbon dioxide+water 17 of 26 symbol equation for thermal decomposition 2NaHCO3->Na2CO3+C02+H2O 18 of 26 How can for the presence of carbon dioxide limewater 19 of 26 what happens to limewater if carbon dioxide is present it will go cloudy 20 of 26 what is put in perfumes to give them smells esters 21 of 26 are esters natural or artificial? both, they can be natural or synthetically manufactured 22 of 26 whats the process called in which esters can be made esterification 23 of 26 Equation for making an ester acid+alcohol->ester+water 24 of 26 5 properties of perfumes easily evaporates, non-toxic, doesn't react with water, non irritant, insoluble in water 25 of 26 name one advantage and one disadvantage of animal testing good-check they wont damage humans. bad- cruel to animals 26 of 26
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