Structure & Polarity Cohesion Adhesion Thermal Properties Solvent Properties
100
What is water?
This is formed when 2 hydrogen atoms and 1 oxygen atoms combine
100
What is cohesion?
Cohesion is when molecules of the same type are attracted to each other.
100
What is adhesion?
The joining of two different substances due to attractive forces that hold them.
100
What are the thermal properties?
Water has the capacity to absorb significant amounts of heat before changing state.
100
What is the Universal Solvent?
A common term for water.
200
What is Negative?
This is the polarity of oxygen
200
Name cohesive properties.
-Cohesion is the ability of like molecules to stick together
OR
-Water is strongly cohesive (it will form hydrogen bonds).
200
What are polar bonds?
Electrons are not shared evenly over the covalent bond and the atoms involved have small partial charges
200
What is the significance of hydrogen bonds in thermal properties?
The H-bonds need to be broken before a change in state can occur and this requires the absorption of energy.
200
What are Ions?
Water can dissolve any substance with this in it.
300
what is positive?
This is the polarity of hydrogen
300
Explain surface tension.
The hydrogen bonding between water molecules allows the liquid to resist low levels of external force (surface tension).

300
What is capillary action?
Attraction to charged or polar surfaces allow water to flow in opposition to gravitational forces.
300
Why is water is an excellent medium for living organisms?
Water is relatively slow to change temperature.
300
What are electronegative atoms?
Water can dissolve these.
400
What is a hydrogen bond?
This forms between an oxygen and a hydrogen atom
400
What are hydrogen bonds?
The bond is between the hydrogen of one water molecule and the oxygen atoms of another water molecule, not between the two hydrogen atoms.
400
What is the significance of capillary action?
This capillary action is necessary to allow water to be transported up plant stems via a transpiration stream.
400
What is heat capacity?
Water supports the maintenance of constant conditions, internal and external.
400
What is the dissociation of the atoms?
This occurs because the polar attraction of large quantities of water molecules can sufficiently weaken intramolecular forces.
500
What is a Net Charge?
What is the total Polarity of H20 Called
500
Why is surface tension important?
The high surface tension of water makes it sufficiently dense for certain smaller organisms to move along its surface.
500
What are the adhesion properties?
-Adhesion is the ability of dissimilar molecules to stick together
OR
-Water will form intermolecular associations with polar and charged molecules.
500
What are hydrogen bonds?
A weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
500
What are dispersive hydration shells?
What are the slightly charged regions of the water molecule surround by atoms of opposing charge called...






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