Water

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  • Created by: CCOSTER
  • Created on: 20-03-14 08:48

Water

Functions of water 

  • Water is a reactant in chemical reactions, like photosynthesis or hydrolysis. 
  • Water transports substances, it is a liquid, solvent and very cohesive so it can transport all sorts of materials.
  • Water helps with temperature control because it has a high specific heat capacity and a high latent heat of evaporation. 
  • Water is a habitat and because it helps with temperature control, is a solent and becomes less dense when it freezes means many organisms can survive and reproduce in it. 

Polarity of water

  • Water consists of two hydrogen atoms and an oxygen atom. 
  • The shared negative hydrogen is pulled towards the oxygen leaving the hydrogen atom slightly positive. 
  • The unshared electrons on the oxygen atom make it slightly negative. 
  • This makes water slightly polar. 

Hydrogen Bonding

  • Hydrogen bonds are weak intermolecular forces between the slightly positive charge on a hydrogen atom and a slightly negative charge on an oxygen atom from another molecule. 
  • Hydrogen bonds are responsible for most of waters properties. 

Properties of Water

Water has a high specific heat capacity:

The energy needed to raise the temperature of 1 gram of a substance by

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