Bonding & Structure (3)

Question 1

Why does the mixture from the separator contain ethanol and water?

Answer 1

Both water and ethanol will condense

Question 2

Use your knowledge of structure and bonding to suggest why the boiling points increase as the number of carbon atoms increases

Answer 2

As the molecules get bigger, the intermolecular forces increase and therefore require more heat energy to overcome

Question 3

Name a soluble compound that contains silver ions

Answer 3

Silver nitrate

Question 4

Name of soluble compound that contains carbonate ions

Answer 4

Potassium carbonate

Question 5

What type of compound is a metal oxide?

Answer 5

Base

Question 6

Describe the structure and bonding in sodium chloride

Answer 6

Lattice which contains positive and negative ions. There are strong electrostatic forces of attraction that hold the oppositely charged ions together in the giant lattice

Question 7

Name the two other components from the electrolysis of sodium chloride solution

Answer 7

Hydrogen and sodium hydroxide

Question 8

Give one ethical reason why a compound of iodine should not be added to sodium chloride used in food

Answer 8

People should have the right to choose

Question 9

Explain why iodine has a low melting point

Answer 9

Simple molecules with weak inter molecular forces which require little energy to overcome