Water Flashcards
Is water non-polar or polar?
Polar.
What is a polar molecule?
A molecule that has no overall charge. In water, this is because the oxygen atom at the end of the molecule has a negative charge whilst the hydrogen atoms have positive charges.
What is a dipole?
A polar molecule that has a positive and negative charge.
How is water joined?
By a hydrogen bond.
What is a hydrogen bond?
When two water molecules are in close contact the opposing charges attract and form a bond.
Individually hydrogen bonds are weak but together they are strong because..?
Many bonds form a lattice-like frame which makes it stronger.
Water has a ___ ___ heat capacity.
High specific.
Why does water have a high specific heat capacity?
Because the hydrogen bonds between molecules restrict movement.
Why is water having a high specific heat capacity good?
It keeps habitats stable.
What is hydrolysis?
Water is added to split molecules.
Define cohesion in water.
Water molecules attract and form a lattice.
Why is cohesion a good property in water?
It is useful for water being drawn up xylem.
Define water being a solvent.
The positive and negative parts of water molecules attract other charged molecules (typically ions and polar.)
What is a condensation reaction?
The removal of water to join molecules together.
What does water being a solvent mean?
That it is good at dissolving things.
