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school > chemistry (MATTER) > Flashcards

chemistry (MATTER) Flashcards

1
Q

how many states and types of matter

A

3 states (solid, liquid and gas) 2 types (pure sub. and mixture)

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2
Q

types of pure substances

A

element and compound

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3
Q

example of compound

A

pure water, methane, sugar, salt

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3
Q

examples of element

A

Helium,
copper
calcium
iron
sodium
chlorine
bromine
carbon

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4
Q

description of element

A

cannot be broken down into simpler substances

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5
Q

description of compound

A

has a fixed composition. can be broken down into elements by chemical reactions

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6
Q

types of mixtures

A

solution and suspension

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7
Q

description of solution

A

uniform composition.

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8
Q

examples of solution

A

salt in water, sugar in water, sulphur in carbon dioxide, water in alcohol

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9
Q

description of suspension

A

non uniform composition

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10
Q

examples of suspension

A

salt and sand, sugar and salt, water in oil

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11
Q

what happens when you whip cream?

A

when we whip cream, air enters the cream to make it soft and fluffy.

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11
Q

is whipped cream a pure substance or mixture

A

whipped cream is a mixture of 30% water and cream

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12
Q

what makes the peaks stiff when we whip cream

A

when we whip cream air gets mixed in and the fat in the cream surrounds the air bubbles and keeps them in place.

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13
Q

types of elements

A

metal and non-metal

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14
Q

metal element examples

A

copper (Cu) calcium (Ca) Iron (Fe) Mercury (Hg) Sodium (Na)

15
Q

non-metal element examples

A

oxygen (O) Hydrogen (H) Helium (He) Carbon (C) Chlorine (Cl) Bromine (Br)

16
Q

Mercury is-
Bromine is-

A

the only metal liquid
the only liquid non metal element

17
Q

what are solutions

A

solutions are mixtures of soluble solids, called solutes and liquids called solvents

18
Q

what are aqueous solutions

A

solutions made with water

19
Q

what is a solution of copper sulphate in water

A

CuSO4 (aq) stands for aqueous

20
Q

what is a solute

A

it is a substance that dissolves in a liquid

21
Q

what is a solvent

A

a liquid that dissolves other substances

22
Q

examples of states of matter

A

solid- ice, liquid - water/mercury/milk, gas - hydrogen/carbon dioxide

23
Q

what is a separating funnel used for

A

to separate two liquids that do not mix

24
Q

what are such liquids called

A

immiscible

25
Q

they are -
where they -

A

poured into the separating funnel, separate into two layers

26
Q

the denser layer -
the less dense layer -

A

water
oil

27
Q

when the tap is opened

A

the more dense layer can be collected in a beaker

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