Water revision mindmap
- Created by: DHorwood
- Created on: 14-10-14 18:17
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- H2O
- charged with Oxygen atom (+)
- to form strong covalent bonds
- and two Hydrogen atoms (-)
- Water molecules attract each other to form Hydrogen bonds (weak)
- and two Hydrogen atoms (-)
- Solvent
- Ionic substances like salts, covalent like sugars and amino acids, dissolve in water (HYDROPHILIC)
- important transport medium in animals and plants
- Ionic substances like salts, covalent like sugars and amino acids, dissolve in water (HYDROPHILIC)
- Water has a high heat capacity
- As water evaporates it extracts heat from around it, cooling the organism e.g. sweating
- Solid water has greater density than liquid water
- Water molecules stick together easily (COHESION)
- Polar (imbalance of charge)
- 80% of mass of living organisms
- Non polar molecules like lipids are HYDROPHOBIC
- Ionisation is when salts dissolve in water then ionise into + and - ions.
- Water contains both acidic and alkaline ions so remains neutral pH
- pH 1 Battery acid - pH 14 Sodium Hydroxide (Alkaline)
- Water contains both acidic and alkaline ions so remains neutral pH
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