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GCSE Chemistry > C4 - Material choices > Flashcards

C4 - Material choices Flashcards

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1
Q

How many monomers are used in condensation polymerisation

A

2

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2
Q

What is the functional group for carboxylic acid

A

O
!!
C
!
OH (cooh)

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3
Q

Functional group for alcohol

A

OH

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4
Q

What is taken from the carboxylic acid for condensation polymerisation to happen

A

the OH of the COOH

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5
Q

What is taken from the alcohol for condensation polymerisation to happen

A

The H of the OH

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6
Q

What does the H and the OH from each functional group create in condensation polymerisation?

A

Water molecule

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7
Q

Why are polymers formed from condensation polymerisation biodegradable

A

Because bacteria can break down the ester link

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8
Q

What is the ester link?

A

O
!!
C – O

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9
Q

What is the melting point of giant covalent structures

A

Very high

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10
Q

Why dont giant covalent structures conduct electricity

A

Because there are no free electrons or ions

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11
Q

Why can graphite be rubbed onto paper

A

Because of the weak forces between layers

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12
Q

What is graphene

A

A single sheet of graphite

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13
Q

What properties do crosslinks in polymers cause

A

Don’t soften when heated
They are strong
They are hard
They are stiff

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14
Q

What size are nanoparticles

A

1-100nm

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14
Q

What are 4 uses of nanoparticles`

A

Catalysts
Nanomedicine
Electric circuits
Antimicrobial - silver

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15
Q

How can nanoparticles be used in nanomedicine

A

By delivering drugs directly into the cells

16
Q

How can nanoparticles be used in electric circuits

A

Because some of them conduct electricity, very tiny computer chips might be possible

17
Q

2 risks of nanoparticles in sunscreens

A

They might be harmful to cells
They might be harmful to environment, e.g if they get in our water systems via sun cream washing away for example

18
Q

What is a dicarboxylic acid monomer

A

A monomer with 2 COOH groups

19
Q

What is a diol monomer

A

A monomer with 2 OH groups

GCSE Chemistry (7 decks)

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