New Test Thursday

Question 1

What is Metallic Bonding

Answer 1

the electrostatic force of attraction between positively charged ions and delocalised electrons

Question 2

Why are metallic elements conductors of electricity?

Answer 2

because they contain delocalised electrons

Question 3

show the reaction of metals with oxygen

Answer 3

Metal + Oxygen -> Metal oxide

Question 4

show the reaction of metals with water

Answer 4

Metal + Water -> metal hydroxide + Hydrogen

Question 5

show the reaction of metals with acids

Answer 5

Metal + Acid -> Salt (metal chloride) + hydrogen

Question 6

Why are metals arranged in the reactivity series

Answer 6

To show the rate of which metals react

Question 7

How do you produce soluble salts?

Answer 7

excess metal is added to the appropriate acid; the mixture is filtered and the filtrate evaporated to dryness

Question 8

During the extraction of metals, what are formed

Answer 8

metal ions are reduced forming metal atoms

Question 9

T or F: The method used to extract a metal from its ore depends on the position of the metal in the reactivity series

Answer 9

True

Question 10

What is electrolysis

Answer 10

the decomposition of an ionic compound into its elements using electricity

Question 11

when should you use a d.c supply

Answer 11

if the products of electrolysis are to be identified

Question 12

positive ions gain what

Answer 12

electrons at the negative electrode

Question 13

negative ions lose what

Answer 13

electrons at the positive electrode

Question 14

How is the heat alone method carried out?

Answer 14

(diagram)

Question 15

How is the heat and carbon method carried out?

Answer 15

Diagram)

Question 16

How is the metal reacted with water reaction carried out?

Answer 16

(method)

Question 17

How is the metal reacted with acid reaction carried out?

Answer 17

(method)

Question 18

Draw the reactivity series

Answer 18

(drawing)

Question 19

What is an Alloy?

Answer 19

An alloy is a mixture of 2 or more elements where atleast one element is metal.

Question 20

Why are alloys made?

Answer 20

To increase strength, to increase corrosion resistance, to make cheaper

Question 21

What is an everyday example of an alloy?

Answer 21

A gold ring is made of gold and copper, as it cannot be pure gold. Gold is too flimsy.

Question 22

Aluminium metal is used to make aircraft, saucepans, window frames and cooking foil. State 3 properties which make it suitable for the use it is put

Answer 22

Conducts heat, flexible, lightweight

Question 23

What is it meant by recycling metals?

Answer 23

To turn old, unused metals into something new.

Question 24

why do we recycle metals?

Answer 24

Metals don’t decompose, and are in high demand. Therefore, we recycle metals to stop pollution and save our metal supply.

Question 25

How does metals being packaged under oil indicate the reactivity of the metals

Answer 25

The metals react quickly with oxygen and therefore have to be packaged under oil to prolong their use. This lets us know that the metals being packaged are highly reactive.

Question 26

When reacting a metal with oxygen, what chemical was used to provide the oxygen?

Answer 26

Potassium permangate