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Flashcards in C1 Deck (29):
1

How do emulsifiers work

Hydrophilic end binds with water
Hydrophobic end binds with oil

2

What happens to protein molecules when you heat them?

They denature

3

Why are potatoes easier to digest when cooked?

The cells wall rupture
Starch grains swell and spread out
Gets rid of rigid wall of cellulose

4

What is the equation for thermal decomposition and and example of I

Sodiumhyrdocarbonate -> sodium carbonate + carbon dioxide + water

Baking powder when heated makes cake rise

5

Equation for a ester

Acid + alcohol -> ester + water

6

Name 5 properties perfumes need

Easily evaporate
Non-toxic
Doesn't react with water
Non irritable
Insoluble in water

7

Paint contains........(3)

Solvent
Binding medium
Pigment

8

What does the solvent do?

Thins paint, makes it easier to spread

9

What does the pigment do?

Gives paint it's colour

10

What does the binding medium do

Holds pigments together and sticks them to the surface you've painted

11

What are paints

Colloids

12

Properties of water based paints

Ideal for inside walls
Fast drying
No harmful fumes

13

Properties of oil based paints

Gloss paint
Dries in 2 stages
Ideal for outside doors

14

What are thermochromic paints

Change colour when heated or become transparent

15

What are phosphorescent pigments

Glow in the dark
Absorb natural/artificial light and store energy

16

What is polymerisation

Lots of small monomers joining together to form polymers

17

What is addition polymerisation

Monomers that have a double covalent bond open their double bonds and join together to make polymer chains

18

What are unsaturated compounds

Molecules with at least one double covalent bond

19

What are saturated molecules

Molecules with no double covalent bonds

20

What do hydrocarbons contain?

Carbon and hydrogen atoms ONLY

21

What is the formula for alliances

CnH2n+2

22

What is the formula for alleges

CnH2n

23

Equation for incomplete combustion

CnHn + O2 -> CO2 + C + CO + H2O

24

Equation for complete combustion

CnHn + O2 -> CO2 + H2O

25

Equation for cracking

Long hydrocarbon -> shorter Alkane + Alkene

26

Conditions needed for cracking?

High temperature and a catalyst

27

What use is cracking?

Petrol, diesel, polymers

28

What are emulsifiers

Additives that make oil and water mix

29

What causes acid rain and what does it lead to

Sulphur dioxide and oxides of nitrogens

Kills fish trees and statues