CC5 Ionic Compounds

Question 1

What types of elements will an ionic compound contain? (metals or non-metals?)

Answer 1

Metal and non-metal elements

Ammonium compounds are an exception.

Question 2

Sodium chloride is an ionic compound, NaCl. How many atoms will you likely find chemically bonded together in a sample of pure sodium chloride?

Answer 2

NOT 2, a huge number, billions. The formula just shows the ratio of sodium to chlorine is 1-to-1

Question 3

Define giant ionic lattice

Answer 3

A huge 3D network of ions

Question 4

State the melting points of ionic substances

Answer 4

High

Question 5

Explain why ionic substances have high melting points.

Answer 5

Strong electrostatic bonds between oppositely charged ions take a large amount of energy to break.

Question 6

Ionic compounds contain charged paticles that can sometimes move around. What is the name of this charged particle?

Answer 6

Ions

Question 7

Do ionic compounds have delocalised (free to move) electrons?

Answer 7

No

Question 8

Will NaCl_(s) conduct electricity?

Answer 8

No

Question 9

Will NaCl_(l) conduct electricity?

Answer 9

Yes

Question 10

Will NaCl_(aq) conduct electricity?

Answer 10

Yes (aq stands for aqueous which means it is dissolved in water) The ions can move around when it is dissolved.

Question 11

What does molten mean?

Answer 11

Melted

Question 12

Explain why ionic compounds do not conduct electricity when solid

Answer 12

Because the ions are not free to move

Question 13

Explain why ionic compounds conduct electricity in solution

Answer 13

Because the ions are free to move

Question 14

Explain why ionic compounds conduct electricity when molten

Answer 14

Because the ions are free to move