Bonding And The Chemistry Of Water

Question 1

What is valency?

Answer 1

The combining power of an element especially as measured by the number of hydrogen atoms it can displace or combine with

Question 2

What are lewis structure diagrams?

Answer 2

Show only electrons in the outer shells (ionic bonding)

Question 3

What are the properties of ionic compounds?

Answer 3

High melting and boiling points
Conducts electricity in solution/molten
ionic crystals shatter easily
soluble in water
tend to occur when the energy required to remove electrons is low

Question 4

What are covalent bonds?

Answer 4

Share electrons - no charged particles

Question 5

What are the properties of covalent bonds?

Answer 5

low melting and boiling points
low solubility in water
don’t conduct electricity

Question 6

What are the typical bondings?

Answer 6

ionic - metal + non metal
covalent - non metal + non metal
metallic - metal + metal

Question 7

What are the properties of metallic bonds?

Answer 7

crystalline structure
repeating pattern
shiny - free electrons re-emitting light
conduct electricity 
distort without breaking

Question 8

Properties of water?

Answer 8

Can be liquid, solid, gas all at the same temperature
very high boiling point
solid water floats on liquid water
stores large amounts of energy
high surface tension
dissolves more substances than any other liquid
covalent and hydrogen bonds

Question 9

Specific heat capacity?

Answer 9

temperature and heat arent the same.
temperature - how hot
heat - thermal energy
amount of energy needed to change the temperature of a 1kg substance by 1 degree

Question 10

Specific heat capacity of water and ice?

Answer 10

Water - 4181 J/kg degrees c

ice - 2030 J/kg degrees c

Question 11

Why does water have a high surface tension?

Answer 11

At the surface the molecules cant have hydrogen bonds with the air. the bond is spread horizontally