C3 - Chemicals of the natural environment

Question 1

What is metallic bonding

Answer 1

Bond between metals

Question 2

What type of structures are metals

Answer 2

Giant structures

Question 3

What keeps the metal bonded together

Answer 3

The opposite electrostatic charges between the positive ions and the negative delocalised electrons

Question 4

Why do metals have high melting points

Answer 4

Because the electrostatic forces are very strong

Question 5

What is an ionic bond

Answer 5

A bond between a metal and a non metal

Question 6

What is left out of ionic equations

Answer 6

Something that is the same on both sides of the equation

Question 7

How do you write an ionic equation

Answer 7

Break up everything that forms ions

Question 8

When do metals displace other metals

Answer 8

The more reactive metal will displace the less reactive one

Question 9

What is it called when something gains oxygen in a reaction

Answer 9

Oxidation

Question 10

What must you never include in a half equation

Answer 10

minus electrons, always put them on the other side

Question 11

What is it called when something loses electrons

Answer 11

oxidation

Question 12

What is it called when something gains electrons

Answer 12

reduction

Question 13

What is the negative elctrode

Answer 13

Cathode

Question 14

What is a covalent bond

Answer 14

A bond between two non metals

Question 15

How do covalent bonds work

Answer 15

The two atoms SHARE electrons

Question 16

Are the covalent bonds inside the molecule strong or weak

Answer 16

Strong

Question 17

Are the intermolecular forces between covalent molecules strong or weak

Answer 17

weak, meaning covalent substances have a low melting point

Question 18

What is the empirical formula

Answer 18

lowest ratio of elements molecules

Question 19

Does methane have a double bond

Answer 19

no

Question 20

Does methene have a double bond

Answer 20

yes

Question 21

What makes a hydrocarbon runny

Answer 21

shorter = more runny

Question 22

What’s more volatile, long or short chain hydrocarbons

Answer 22

short

Question 23

What’s more flammable, long or short chain hydrocarbons

Answer 23

shorter

Question 24

Whats the functional group for alkane

Answer 24

C-C

Question 25

Hydrocarbon + oxygen =

Answer 25

Carbon dioxide + water

Question 26

≈what is the gain of electrons in electrolysis called

Answer 26

reduction

Question 27

what is the loss of electrons in electrolysis called

Answer 27

oxidisation

Question 28

do the positive ions gain or lose electrons at the cathode

Answer 28

gain

Question 29

If a metal oxide has a high melting point, how do u reduce it.

Answer 29

Mix it with cryolite

Question 30

When are electrolysis reactions needed

Answer 30

To separate the metal from its metal oxide, IF it cannot be displaced by carbon because it is more reactive.

Question 31

Why do u need to melt down the metal oxide for electrolysis

Answer 31

So the ions can move to their designated electrode

Question 32

In solution electrolysis, what determines what will be made at the cathode

Answer 32

If the metal ion is more reactive than hydrogen, then the H+ ions present in the water will be discharged, and released as hydrogen gas

Question 33

What is the half equation for OH- ions forming water and oxygen

Answer 33

4OH- —-> 2H2O + O2 + 4e-

Question 34

In solution electrolysis, what determines what will be made at the anode

Answer 34

If the ion contains a halogen, it will be discharged. If it does not, then the OH- ions will be released as water and oxygen