Chapter 3.1 - Ionic bonds

Question 1

Suggest the type in thallium II bromide and state why the melting point is high (3)

Answer 1

Ionic bonding,

• oppositely charged ions,
• strong attraction between ions

Question 2

State the type of bonding in lithium fluoride and why the mp is high (3)

Answer 2

Ionic bonding,

• oppositely charged ions,
• strong attraction between ions

Question 3

Explain in terms of bonding and structure why KBrF has a high melting point

Answer 3

Ionic bonding,

• oppositely charged ions,
• strong electrostatic attraction

Question 4

Suggest why the mp of sodium chloride is high

Answer 4

Ionic bonding,

• oppositely charged ions,
• strong electrostatic attraction

Question 5

What is the formula for the compound sulfate ?

Answer 5

SO4^-2

Question 6

What is the formula for the compound hydroxide

Answer 6

OH-

Question 7

What is the formula for the compound nitrate ?

Answer 7

NO3

Question 8

What is the formula for the compound carbonate and ammonium ?

Answer 8

Ammonium NH4+ ,

Carbonate CO3^-2

Question 9

What are the properties of ionic bonds ?

Answer 9

• high mp bp,
• conducts electricity when molten or dissolved in water,
• brittle and shatter easily,
• tend to dissolve in water

Question 10

Why can ionic bonds conduct electricity when molten or dissolved in water ? (2)

Answer 10

• The ions separate,

- Ions that carry charge are free to move in the liquid state

Question 11

Define ions

Answer 11

Charged particles bcoz of the imbalance in protons and electrons