Water Flashcards
What is water’s structure?
-Two hydrogen atoms joined to one oxygen.
What bonds form between water molecules?
-Hydrogen, between an oxygen and hydrogen atom.
Why is water polar?
-Due to the covalent bonding, the oxygen has a slight negative charge and the hydrogen has a slight positive charge, therefore it has a region of positivity and negativity.
Is oxygen delta negative or positive?
-Delta negative.
What are the properties of water?
- High boiling point.
- Less dense when solid.
- Good solvent.
- Cohesive and adhesive.
- Good transport medium.
- Coolant.
- Stable.
Why does water have a high boiling point?
-The hydrogen bonds require a lot of energy to break them, and so increase the temperature.
Why is water less dense when solid?
-When temperature decreases this causes the hydrogen bonds to move further apart, forming a giant, rigid but open structure which causes the ice to float.
Why is water a good solvent?
-Due to it’s polarity, many solutes can be dissolved in the water.
Why is water cohesive and adhesive?
- Cohesive=water molecules attracted to one another and move together.
- Adhesive=water molecules attracted to other materials.
- This allows water to be used in capillary action.
Why is water a good transport medium?
-Due to it’s cohesive and adhesive properties, water will be transported together and substances will be transported within it.
Why is water a coolant?
-Buffer temperature changes due to the large amounts of energy needed to break the hydrogen bonds.
Why is water stable?
- It doesn’t change the temperature easily.
- It forms an insulating layer below ice in rivers and lakes which help organisms survive in colder months.
