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Chem Learning Outcomes > Fragrances And Skin Care Products > Flashcards

Fragrances And Skin Care Products Flashcards

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1
Q

What are essential oils

A

Concentrated extracts of the volatile, non water soluble aroma compounds from plants

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2
Q

Essential oils are mixtures of organic compounds

A

.

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3
Q

What process is used to extract

A

Distillation

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4
Q

State uses of essential oils

A

Perfumes and flavouring for food

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5
Q

What group of compounds are the key components in essential oils

A

Terpenes

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6
Q

If there is a hydroxyl group or carboxyl group on the molecule it will allow hydrogen bonding with water so increase solubility in water and other polar solvents and vice versa for compounds containing only carbon bonds

A

. Learn

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7
Q

Systematic name of isoprene and the structure

A

2 methylbuta-1,3-diene

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8
Q

What are terpenes

A

Unsaturated compounds formed by joining together isoprene units

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9
Q

Unsaturated is what type of bond

A

A double

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10
Q

Terpene can be oxidised within plants to produce spice aromas

A

.

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11
Q

What is ultraviolet radiation

A

A high energy form of light present in sunlight

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12
Q

What effects can exposure to UV light have on skin

A

Cause sunburn and aging of skin

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13
Q

Why does sun block products prevent your skin burning

A

Prevents UV light reaching the skin

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14
Q

Why does exposure to UV light enable some chemical reactions

A

It gives them sufficient energy for bonds to be broken

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15
Q

What is a free radical

A

A substance with an unpaired electrons.

Compounds Containing free radicals are very reactive

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16
Q

How are free radicals formed

A

A sufficiently reactive substance is exposed to UV light and bonds between atoms break

17
Q

The three steps in free radical chain reactions are?

A

Initiation, propagation and termination

18
Q

Why are these reactions called chain reactions

A

Some steps that produce products also produce another reactive free radical that can continue the reaction

19
Q

Name 3 types of products that contain free radical scavengers

A

Plastics and cosmetics

20
Q

What do free radical scavengers do

A

They are molecules which can react with free radicals to form stable molecules and prevent chain reactions

Chem Learning Outcomes (7 decks)

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