Activate 2 Chemistry Acids And Metals - Useful Questions

Front 1

Name the products in the reaction of a metal with an acid.

Back 1

Salt and Hydrogen Gas.

Front 2

Describe how you could test for hydrogen gas.

Back 2

- Hold an empty test tube above the reaction test tube

- Light a splint

- Hold the splint in the test tube that now contains the gas

- If the splint goes out with a squeaky pop, the gas is hydrogen.

Front 3

Write the state symbols for a substance in the gas state and in the solid state

Back 3

(s) means solid

(g) means gas

Front 4

Name two metals that react vigorously with oxygen from the air

Back 4

Magnesium and Zinc

Front 5

List the metals in the table in order of how vigorously they react with oxygen, starting with the most reactive

Back 5

Magnesium

Zinc

Iron

Lead

Copper

Gold

Front 6

Name the products of the reaction of calcium with water

Back 6

calcium hydroxide + water -> calcium hydroxide + hydrogen

Front 7

Write the state symbols for a substance in the liquid state and dissolved in water

Back 7

(l) for the liquid state

(aq) for a substance dissolved in water

Front 8

Name two metals that react with steam but not with cold water

Back 8

Magnesium and Zinc

Front 9

State what a displacement reaction is

Back 9

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

Front 10

State why copper cannot displace magnesium in magnesium sulfate solution.

Back 10

because copper is less reactive than magnesium.

Front 11

State the meaning of the word ore.

Back 11

Ore is a rock that you can extract a metal from.

Front 12

Describe two stages in extracting a metal from its ore

Back 12

- Separate iron oxide from the compounds it is mixed with

- Use chemical reactions to extract iron from iron oxide

Front 13

Carbon displaces copper from copper oxide, Write a word equation for this reaction.

Back 13

carbon + copper oxide -> copper + carbon dioxide

Front 14

State what a ceramic material is

Back 14

Ceramic materials are compounds which include metal silicates, metal oxides, metal carbides and metal nitrides

Front 15

List four physical properties and one chemical property of ceramics.

Back 15

- hard

- brittle

- stiff

- They do not react with water, acids or alkalis

Front 16

List three uses of ceramics

Back 16

- Insulators

- Building Materials

- Pottery

Front 17

State what a polymer is

Back 17

A polymer is a substance with very long molecules, which have identical groups of atoms repeated many times.

Front 18

Give an example of a polymer and one of it's uses.

Back 18

Wool is an example of a natural polymer, and it is useful for things like jumpers and socks as it traps air between them.

Front 19

State why low-density poly(ethene) makes good carrier bags.

Back 19

Both types of poly(ethene) do not wear away or break down naturally. However, this also makes it harder to get rid of carrier bags.

Front 20

State what a composite material is

Back 20

A composite is a mixture of materials. Each material has different properties.

Front 21

Name two materials in carbon-fibre-reinforced plastic

Back 21

- carbon fibres, which are thin tubes of carbon The fibres are woven into a fabric

- a gluelike polymer, which is moulded into different shapes when soft

Front 22

Name two materials in glass-fibre-reinforced aluminium

Back 22

- thin layers of aluminium

- layers of glass fibre