Water

• Define Condensation:

  A reaction that occurs when two molecules are joined together with

  the removal of water
• Define Hydrolysis:

  A reaction that occurs when molecules are split into smaller molecules with the addition of water
• How does condensation happen?

  The hydroxyl group from one monomer joins together with the hydrogen from another forming water
• Condensation and Hydrolysis are metabolic reactions
• State the Properties of Water:

  • Cohesion
  • Adhesion
  • Capillary action
  • good Solvent
  • ice is less dense than water
  • High specific heat capacity
  • high latent heat of vaporisation
  • reactant
• In water, oxygen is slightly more negative and hydrogen is slightly more positive
• What are the greek symbol meaning 'slight' negative and positive charge called?

  • δ- (delta electronegative charge)

  δ+ (delta electropositive charge)
• Describe the formation of a hydrogen bond between two molecules of water:

  hydrogen bonds form between the electropositive hydrogen atom and the lone pairs of electrons on the adjacent electronegative oxygen atom
• State and explain the property relating to density of water that contributes to the survival of organisms.

  • ice is less dense than water
  • ice acts as an insulating layer = prevents the body of water from freezing, maintains its temperature, aquatic organisms can continue moving, oxygen and resources can continue circulating
  • Provides a habitat for organisms
  • allows organisms to float = buoyancy