Q: Electronegativity only affects molecules
with what type of bond?
A: Nonpolar
Q: What is the word for “equally shared
electrons”?
A: Oxygen
Q: One of the strongest elements (based
on electronegativity) is….
A: delta symbol δ
Q: How is electronegativity represented in
a molecule?
A: Stronger element
Q: Who becomes negative, the stronger or
the weaker element?
A: CH4 (methane), H2 (Hydrogen gas)
Q: Give two examples of nonpolar
molecules.
A: H20 (water), CO2 (carbon dioxide)
Q: Give two examples of polar molecules.
A: solution the same throughout
Q: Define homogenous.
A: Aqueous because water is the solvent
Q: NaCl + H2O
– What type of solution is this? Why?
A: Ionic and polar covalent
Q: What two specific bond types are
hydrophilic?
A: nonpolar bond
Q: What specific bond type is
hydrophobic?
A: Hydrophilic because of the charges that
make it want to split up
Q: Which, hydrophilic or hydrophobic,
mixes with water? Why?
A: Hydrogen bond
Q: The bond between the oxygen of one
water molecule and the hydrogen of
another is what type of bond?
A: 4 total, 2 hydrogen and 2 covalent
Q: How many bonds can a single oxygen of
water have? What types of bonds are
these?
A: One is between like substances and the
other is between two different substances
Q: What is the difference between
cohesion and adhesion?
A: Cohesion
Q: Which, cohesion or adhesion, applies to
surface tension?
A: Amount of heat absorbed/lost for 1g to
change 1⁰C
Q: Define and explain specific heat.
A: High because it can store and hold on to
the heat
Q: Does water have a high or a low specific
heat? Explain.
A: Short time because it easily gives off the
heat, it cannot store it
Q: Does it take a long time or a short time
for something with a low specific heat to
change in temperature? Why?
A: Solid
Q: In what state is water less dense, a solid
or a liquid?
A: Expands
Q: At temperatures above 4 degrees
Celsius, water _______ (expands or
contracts) as it warms.
A: 0⁰C
Q: At what temperature does water
become locked into a crystalline lattice?
A: 4 hydrogen bonds
Q: In crystalline lattice, how many bonds
does each water molecule have?
A: Contracts
Q: From 0 degrees to 4 degrees, water
______ (expands/contracts).
A: Hydrogen is very weak and oxygen is
very strong. It wants to bond with
anything.
Q: Why is water the solvent of life?
A: Covalent bond