Water
Water and it's properties- apologies for the amount of colour- found it hard to separate the information on the left so decided to do it in colour instead
- Created by: TayaMairead
- Created on: 30-10-13 20:39
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- Water
- Polar Molecule
- Each hydrogen shares a pair of electrons with oxygen
- Oxygen has a greater affinity for electrons
- oxygen has a slightly negative charge
- hydrogen has a slightly positive charge
- Oxygen has a greater affinity for electrons
- A polar molecule has different charged areas
- Each hydrogen shares a pair of electrons with oxygen
- Hydrogen Bonds
- Slight negative charge of the oxygen of one water molecule is attracted to the slightly positive hydrogen atom of another molecule
- individually are weak
- when there are many they stick together forming a strong lattice framework
- Known as Cohesion
- when there are many they stick together forming a strong lattice framework
- Properties of Water
- Solvent
- Polar nature makes it a good solvent for dissolving:
- Ions
- Other Polar molecules
- Many chemical reactions occur in solution so water is an excellent transport medium
- Animals
- The blood transports dissolved substances around the body
- Plants
- Xylem transports water and mineral ions
- Animals
- Polar nature makes it a good solvent for dissolving:
- Surface Tension
- When water meets air, water molecules form hydrogen bonds with other water molecules but not the air
- Cohesion produces an uneven distribution of force
- surface tension- this forms a skin that can support aquatic plants and insects
- hydrogen bonds pull water molecules together
- Cohesion produces an uneven distribution of force
- When water meets air, water molecules form hydrogen bonds with other water molecules but not the air
- Specific Heat
- How much heat energy is required to raise the temperature of water?
- High specific heat capacity as energy is needed to break the hydrogen bonds
- water resists temperature changes providing a more stable environment
- Aquatic organisms
- Prevents enzymes from becoming denatured
- water resists temperature changes providing a more stable environment
- Untitled
- Latent Heat
- High latent heat
- Allows evaporation from the surface of organisms to provide a significant cooling effect
- How much heat is required to cause water to evaporate?
- energy to break hydrogen bonds
- High latent heat
- Density
- Less dense as a solid than a liquid
- Ice floats on water
- When water freezes it forms hydrogen bonds with four other molecules
- This structure holds molecules further apart than in a liquid
- Ice
- Floats on water
- Forms insulating layer
- Aquatic organisms can survive in frozen lakes
- Habitat for polar bears
- Less dense as a solid than a liquid
- Transparency
- Allows light to pass through so aquatic plants can photosynthesise effectively
- Solvent
- Polar Molecule
- H20
- Water
- Polar Molecule
- Each hydrogen shares a pair of electrons with oxygen
- Oxygen has a greater affinity for electrons
- oxygen has a slightly negative charge
- hydrogen has a slightly positive charge
- Oxygen has a greater affinity for electrons
- A polar molecule has different charged areas
- Each hydrogen shares a pair of electrons with oxygen
- Hydrogen Bonds
- Slight negative charge of the oxygen of one water molecule is attracted to the slightly positive hydrogen atom of another molecule
- individually are weak
- when there are many they stick together forming a strong lattice framework
- Known as Cohesion
- when there are many they stick together forming a strong lattice framework
- Properties of Water
- Solvent
- Polar nature makes it a good solvent for dissolving:
- Ions
- Other Polar molecules
- Many chemical reactions occur in solution so water is an excellent transport medium
- Animals
- The blood transports dissolved substances around the body
- Plants
- Xylem transports water and mineral ions
- Animals
- Polar nature makes it a good solvent for dissolving:
- Surface Tension
- When water meets air, water molecules form hydrogen bonds with other water molecules but not the air
- Cohesion produces an uneven distribution of force
- surface tension- this forms a skin that can support aquatic plants and insects
- hydrogen bonds pull water molecules together
- Cohesion produces an uneven distribution of force
- When water meets air, water molecules form hydrogen bonds with other water molecules but not the air
- Specific Heat
- How much heat energy is required to raise the temperature of water?
- High specific heat capacity as energy is needed to break the hydrogen bonds
- water resists temperature changes providing a more stable environment
- Aquatic organisms
- Prevents enzymes from becoming denatured
- water resists temperature changes providing a more stable environment
- Untitled
- Latent Heat
- High latent heat
- Allows evaporation from the surface of organisms to provide a significant cooling effect
- How much heat is required to cause water to evaporate?
- energy to break hydrogen bonds
- High latent heat
- Density
- Less dense as a solid than a liquid
- Ice floats on water
- When water freezes it forms hydrogen bonds with four other molecules
- This structure holds molecules further apart than in a liquid
- Ice
- Floats on water
- Forms insulating layer
- Aquatic organisms can survive in frozen lakes
- Habitat for polar bears
- Less dense as a solid than a liquid
- Transparency
- Allows light to pass through so aquatic plants can photosynthesise effectively
- Solvent
- Polar Molecule
- Water
- Two hydrogen atoms covalently bonded to one oxygen atom
- H20
- H20
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