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Science year 8 > C3 Metals And Acids > Flashcards

C3 Metals And Acids Flashcards

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1
Q

When matals react with hydrochloride acid what are the products

A

Hydrogen and a chloride salt

eg… zinc chloride + hydrogen

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2
Q

How do you decribe a reaction

A

On how vigorous it was

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3
Q

How do other metal react with acids

A

Metals have patterns in chemical properties. But some metal react more vigorously with acids compared to others

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4
Q

How do you test for hydrogen

A

Collect the gas from the reaction
Light a splint
Hold the splint over the test tube that contains the gas
Listen, if the aplint goes out with a squeakz pop, the gas is hydrogen

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5
Q

Why does the squeaky pop happen

A

Hydrogen and oxygen react explosively - the product is water

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6
Q

Do all metals react with dilute acids

A

Some metals dont - gold silver or copper in hydrochloric acid

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7
Q

What afe state symbols

A

They give the state of a substance in a chemical equation

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8
Q

What does (s) mean

A

Solid

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9
Q

What does (l) mean

A

Liquid

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10
Q

What does (g) mean

A

Gas

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11
Q

What does (aq) mean

A

Dissolved in water

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12
Q

Where can you find hydrochloric acid natually

A

In animals and humans stomachs

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13
Q

What happenss when magnesium reacts with oxyegn

A

It burns vigorously

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14
Q

What is the product when a metal and oxygen react

A

The metal oxide
Eg:
Zinc oxide (2ZnO)

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15
Q

How do other metals reacts with oxygen

A

When zinc reacts you see bright white sparks in the burnsern falme same woth iron
Copper doesnt burn it forms black copper oxide on its surface
Gold is unreactive

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16
Q

How do reactions with acids and oxygen compare

A

There is a pattern. Metala that reacts vigorously with dilute acids also react vigorously with oxygen. Metals that dont react with dilite acid dont react with oxygen

17
Q

What is the balanced symbol equation for magnesium and oxygen

A

2Mg(s) + O2(g) -> 2MgO(s)

18
Q

What metals dont react with water

A

Copper, stainless steel, gold

19
Q

What are the droducts of calcium and water

A

Calcium hydroxide + hydrogen

20
Q

How do other metal react with water

A

Group 1 metals react very vigorously with water

Potassium reacts with a flame - sodium and lithium react slightly less vigorously

21
Q

How does magnesium react with steam

A

Magnesium reacts quickly with steam - it lets off its bright white light

22
Q

How do you get magnesium to react with steam in the experiment

A

You need mineral wool soaked in water to make steam by heating it woth a bunsern burner

23
Q

What are the products when metals react with steam

A

Hydrogen and metal oxide

24
Q

What is the reactivity series

A

The list of metals in order of how vigorously they react with acids, oxygen, and water

25
Q

How do scientists get copper from rock by using chemical reactions

A

Add sulfuric acid to the rock, copper sulfate forms

Add watse iron to the cooper solution and the iron displaces the copper from its compound

26
Q

What is a displacement reaction

A

In a displacement reaction, a more reactive metal displaces - or pushes out- a less reactive metal from its compound

27
Q

What is the balenced symbol equation for copper sulfate and iron

A

Fe(s) + CuSO4(aq) —> FeSO4(aq) + Cu(s)

28
Q

What will happen if you add copper to a magnesium sulfate solution

A

Nothing will happen because magnesium is more reactive so copper can’t displace it

29
Q

What is a thermite reaction

A

Reaction of aluminium with iron ti make aluminium oxide and iron

30
Q

What happens in a thermite reaction

A

You have to mix two powders and heat them strongly. The reaction is exothermic. Tge reaction get so hot that the iron melts

31
Q

Do oxides take part in displacement reactions

A

Yes - an example of this is the thermite reaction

32
Q

What is an ore

A

A substance that you can extract metal from

33
Q

How are metal extracted from ores

A

Seperate the metal oxide from the compounds its mixed with

Use chemical reactions to extract the metal from the metal oxide

34
Q

Which metals can be displaced by carbon

A

Any of the metals that are below it in the reactivity series

35
Q

Where is carbon in the reactivity series

A

Between aluminium and zinc

36
Q

Can carbon extract any metal from its compounds

A

No - it cant displace metals above it in the reactivity series

Science year 8 (10 decks)

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