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chemistry > Metals and reactions > Flashcards

Metals and reactions Flashcards

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1
Q

What happens in displacement reaction

A

When one more reactive metal takes the element from the less reactive metal

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2
Q

Definition of atom

A

The smallest bit of matter that forms an element

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3
Q

Definition of element

A

A substance that cannot be broken down into a simpler substance

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4
Q

Definition of compound

A

A mixture of two elements

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5
Q

Metal + oxygen

A

Metal oxide

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6
Q

Metal + acid

A

Metal salt and hydrogen gas

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7
Q

List the sentence to remember the reactivity series

A

Please stop calling me a careless zebra instead try learning how copper saves gold

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8
Q

List the metals in the reactivity series

A

Potassium sodium calcium magnesium aluminum carbon zinc iron tin lead hydrogen copper silver gold

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9
Q

How is iron extracted from its ore

A

It’s mixed with zinc because zinc is more reactive

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10
Q

Where is carbon in the reactivity series

A

it is in fifth just below calcium

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11
Q

4 properties of metals

A

Shiny , High melting points , conductors of heat , High densities

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12
Q 
List the flame test colours for the metals below  
copper
lithium
sodium
Potassium
calcium
A

copper: green
lithium: red
sodium: yellow
Potassium: purple
calcium: orange

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13
Q

Write the word equation for metals reacting with water

A

Metal + water = Metal hydroxide + hydrogen

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14
Q

balance the equation of potassium + water

A

It turns into potassium hydroxide + hydrogen KOH+H2o

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15
Q

What are the following symbols for magnesium tin copper and sodium

A

MG SN CU NA

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16
Q

two useful displacement reactions

A

zinc displacing iron ions from iron (II) sulfate solution
nickel displacing copper from copper (II) nitrate solution
copper displacing silver from silver (I) nitrate solution

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17
Q

What happens to the reactivity of alkali metals as you go down

A

They become more reactive

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18
Q

In which group are the alkali metals

A

group 2

19
Q

What colour will metal oxides turn in the presence of an indicator,

A

They are bases so the indicator will turn pink

20
Q

what is a reduction reaction

A

is a reaction is where oxygen is given up

21
Q

What is a metal ore

A

a mixture of metals

22
Q

What happens to the mass of a metal when it reacts with oxygen where does this extra mass come from

A

metal reacts with oxygen and rusts, the extra mass comes from the oxygen element joining the ore.

23
Q

3 methods of rust prevention

A

to keep the metal painted, oiled & away from water.

24
Q

Formula for sodium chloride + hydrochloric acid = sodium chloride + water

A

NACL+HCL - NACL+ H2O

25
Q

What happens in an exothermic reaction?

A

Heat is released, causing the temperature of the immediate surroundings to rise.

26
Q

What is an endothermic reaction?

A

An endothermic process absorbs heat and cools the surroundings.”

27
Q

What is an example of an endothermic reaction

A

Electrolysis

28
Q

Give an example of an exothermic reaction

A

CaO(s) + H2O (l) → Ca(OH)2(s)= Calcium hydroxide

Water is added to dry cement to make concrete.

29
Q

What is activation energy

A

Minimum quantity of energy to start a reaction

30
Q

What practical way can you measure the amount of energy given off in a chemical reaction

A

Use a calorimeter experiment to measure the amount of heat given off

31
Q

graph showing endothermic exothermic reactions, what would it look like

A

Exothermic has a long tail as the product has a low energy after the reaction so energy has been given off.

32
Q

What to remember when calculating Bond energies,

A

moles(reactants) - (products)moles

33
Q

Difference between rechargeable and non rechargeable batteries ?

A

The chemical reaction is reversible with a rechargeable battery

34
Q

What type of energy is used in a hydrogen cell?

A

Chemical energy produce electricity. It is a clean form of energy

35
Q

What happens in a hydrogen fuel cell?

A

Within the fuel cell, the fuel is oxidised electrochemically rather than being burned

36
Q

Combustion is what type of reaction

A

Combustion also popularly known as burning is an exothermic reaction.

37
Q

Is Combustion a Redox reaction?

A

yes, involving an oxidant which is usually atmospheric oxygen.

38
Q

Photosynthesis is what reaction.

A

Endothermic , The light required is absorbed by a green pigment called chlorophyll in the leaves.

39
Q

Electrolysis is what reaction?

A

Endothermic

40
Q

Neutralization is what reaction?

A

generally exothermic

41
Q

Calcium oxide combines with water is what reaction?

A

exothermic

42
Q

Ammonium chloride dissolves in water is what reaction?

A

endothermic reaction.

43
Q

What happens in a reduction reaction

A

the compound gains electrons

44
Q

What happens in a oxidation reaction

A

the compound loses electrons

chemistry (17 decks)

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