Chemisty

HideShow resource information
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

Other cards in this set

Card 2

Front

whats a food colour

Back

makes food more appetising

Card 3

Front

what is flavour enhancer

Back

Preview of the front of card 3

Card 4

Front

what is an antioxidant

Back

Preview of the front of card 4

Card 5

Front

what is an emulsifier

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Emulsifiers resources »