Water Flashcards
What Bonds form water molecules
Covalent
Water is dipolar true or false
True-molecule with 2 poles/ two different regions that are charged
What molecules form water
2 hydrogens and one oxygen
Why is the oxygen in water slightly negative
Oxygen is slightly negative. This is due to the atom having more protons in its nucleus. As a result through attraction the electrons will float toward the oxygen in the molecule/compound
Why is hydrogen slightly positive in water
As it has less electrons than oxygen and and the electrons that are shared are closer to the oxygen
What is hydrogen bonding
The slightly negative and slightly positive attract each other and create a bond
What is surface tension
Where the water meets the air. As a result the water molecules on top only have the ability to attract to the side and below. This results in surface tension
What is cohesion In water
The hydrogen bonds between water molecules.
What is adhesion in water
Water is able o bind to other molecules such as cellulose
Explain why it is important that water is a good solvent
Can dissolve anything that is polar or charged due to the fact that water is a dipolar molecule which means that the other molecules would be attracted to different ends of the water molecule resulting them being dissolved
Why is water being very cohesive important
Water molecules tend to stick together due to hydrogen bonds therefore water can travel in columns e.g up the xylem also results in surface tension
Why is it important for water to have a high specific heat capacity
To BUFFER/RESIST changes in temperature. There is a high amount of heat energy used to break the hydrogen bonds as a result there is less heat energy to warm water up
Why is it important for water to be transparent
It allows light to pass through the water allowing light to reach aquatic plants allowing them to photosynthesise
Why is it important that water has a large latent heat of vaporisation
It allows animals to lose heat. As it takes a lot of heat energy to break the hydrogen bonds to evaporate animals can use it cool down as the skins heat energy is used to do that
How is water an important metabolite
Condensation- smaller molecules combine to create larger ones. 1 water molecule released
Hydrolysis-larger molecules broken apart. 1 water molecule needed
