C1f-h notes

Seite 1

C1f - Cooking and food additives

EGG = cooked the texture changes because protein molecules have changed shape.

Vegetable + Heat = Cell wall to break down, this releases starch, which cause it to swell up, making it easier to chew.

LIME WATER TESTS IF carbon dioxide IS PRESENT!

Hydrophilic of emulsifier (oil + water don't mix) molecules to polar water molecules!

C1g - Smells

Molecules travel into the nose - the stimulus sense cells detect an oder

PERFUMES AREN'T NATURAL

Esters (alcohol + organic acid = ester + water) compound of synthetic perfumes

Perfumes are volatile - evaporate easily!

Solvents

soluble substance : DISSOLVE IN A LIQUID

insoluble substance: DONT DISSOLVE

solvent: liquid which substance dissolves in

solute: the substance that is being dissolved

solution: solute + solvent

C1h - Paints and pigments

Pigment - gives the paint colour

Binding medium - oil that sticks pigment to the surface

Solvent - dissolves the binding medium to make thinner to coat surface

Thermochoric pigments

Cold mug - hot mug (changes colour from blue to red as a warning)

Mood rings!

Phosphorescent Pigments - glow in the dark paint (for example stars on a wall)

Oil based paints

solvent evaporates

oil binding reacts with oxygen to form hard layer, Oxidation Reaction

C1f

C1g

C1h