Water
The property of water molecules being attracted to other water molecules is called...
Cohesion
What is cohesion?
An attraction between objects
Surface tension causes water to______ on surfaces such as glass.
Bead up
Why does water bead up on your car during rain?
Cohesion
What 2 properties allow for capillary action?
Cohesion and Adhesion
What is the difference between cohesion and adhesion?
Cohesion is an attraction between two of the same objects(water to water) and adhesion is an attraction between two different objects(water to salt)
Why is water the universal solvent?
Dissolves more substances than any other liquid.
What causes water to have surface tension?
Each molecule is surrounded and attracted by other water molecules
What are the three forms of water
Liquid, Gas, Solid
In order to clean a surface, what must happen to surface tension? What type fo chemicals can do this? Give an example.
Surface tension must be reduced. Chemicals that are surface active agents. Ex: Dawn dish detergent
What things will water dissolve?
Will dissolve polar and ionic, will not dissolve hydrophobic
What is the overall charge on a molecule of water?
Neutral
Is water the only polar molecule?
No
What elements make up water?
Hydrogen and Oxygen
Water has a high heat capacity. What does this mean? Give an example
Water is really good at holding heat. Water stays cold
What bonds are found between molecules of water?
Hydrogen bonds
What does Hydrophilic mean?
It can dissolve in water-water "loving", polar
What bonds are found within a molecule of water?
Polar covalent bond
Besides reducing surface tension, what other 4 things can surfactants perform?
Provide alkalinity, loosening, emulsifying(dispersing in water) and holding soil in suspension
Water is unique because it is less dense as a ___ than a ___?
Solid, liquid
Explain what happens whenever several water molecules are near each other in a droplet.
The Hydrogen side of the molecule and the oxygen side attract each other because of a cause between the atoms.
Why is water a polar molecule(seems to have a charge)?
The hydrogen and oxygen charges cancel each other out
What happens with ionic molecules in water?
They separate and ions come apart.
