Covalent compounds and Seperation Techniques

Question 1

What happens is covalent bonding

Answer 1

Electrons are shared

Question 2

Fill in the gap:

When atoms make _________ bonds with 1 or more atoms,they form a ____________

Answer 2

1. Covalent

2. Molecule

Question 3

What are the two types of covalent substances?

Answer 3

1. Simple molecular covalent substances

2. Giant molecular covalent substances

Question 4

Fill in the gap:

In simple molecular covalent substances, the inter-molecular forces between the molecules are very ___.

Answer 4

1. Weak

Question 5

Why don’t simple molecular substances conduct electricity?

Answer 5

There are no ions

Question 6

Fill in the gap:

A giant molecular covalent substance is similar to an ionic lattice, except that there are ___________ ions

Answer 6

1. No charged

Question 7

Give two examples of a giant covalent substance

Answer 7

1.Diamond

2Graphite

Question 8

Unlike other giant covalent substances, why can graphite conduct electricity?

Answer 8

1. There are spare (delocalised electrons) which are free to move

Question 9

What is immiscible?

Answer 9

When two liquids cant mix together

Question 10

What is miscible?

Answer 10

When two liquids can mix together

Question 11

What can be used to separate to immiscible liquids?

Answer 11

A separating funnel

Question 12

What can be used to separate miscible liquids?

Answer 12

Fractional distillation