Properties Of Water Flashcards
What charge do water molecules have and why. Draw a diagram.
Non-polar
Water is dipolar as it has a charger across the molecule.
A lot of electrons at the top of oxygen makes it slightly negative. While a lack of electrons at the bottom of each hydrogen atom makes them slightly positive.
By what bonds do water molecules bond and how does this affect its state ?
Hydrogen intramolecular Bonds.
These require a large amount of energy for hydrogen bonds to be broken and for water to become a gas.
Write the properties of water :
Density of water Surface tension Cohesion Latent heat Specific heat capacity Good solvent Metabolism Colourless with a Hugh transmission Liquid at room temperature
What are the effects of density of water and how does this affect living organisms ?
Ice is less dense than water so will float on top of water when it freezes. The molecules spread out and become rigid, crystalline structure.
The ice then protects things below the surface by becoming an insulating layer between the cold surface and the water.
Prevents freezing to death
What are the affects of surface tension and how does this occur ?
Molecule at the surface are not effected by molecules above therefore pull together more strongly. This creates surface tension meaning species can survive on the surface of the water.
What is cohesion and when is this useful in plants ?
Water molecules a attract to a hotter due to hydrogen bonds.
Transpiration requires this as each water molecules pulls the adjacent molecule. Water can then be pulled through the xylem vessel as the molecules are held by hydrogen bonds.
What is latent heat and how are organisms with a High latent heat helped ?
The heat energy absorbed by a change of state. Water also has high latent heat energy due to needing to absorbs a lot of energy during a change of state.
This makes organisms contains a lot of water more stable.
What is specific heat capacity and how can this affect the internal environment of an organism ?
The heat energy needed to raise the temperatjre of 1Kg of water by 1 degree celcius.
Water has a large heat capacity which makes a very stable internal environment as enzymes and proteins are not easily denatured.
How’s Does water being a good solvent help organisms ?
Enables mass transport in the blood as ions and proteins can easily dissolve.
Transport is a medium for reactions.
How does metabolism of water affect plants ? And what is it.
Hydrolysis is when water breaks down many complex molecules in hydrolysis. This is a major component of photosynthesis.
What is condensation reaction ?
A reaction where water is formed
How does water being colourless with a high transmission affect plants?
Light can pass through for photosynthesis.
How does water being a liquid at room temperature help organisms ?
Conditions are stable in cells and aquatic environments.
