WATER and BUFFERS Flashcards
are the result of sharing of electrons between two atoms
COVALENT BONDS
are formed when one atom donates an electron to another
IONIC BONDS
a measure of the affinity a nucleus has
for outer shell electrons
ELECTRONEGATIVITY
TRUE OR FALSE:
High electronegativity corresponds to high affinity.
TRUE
Hydrogen bonds between water molecules
are the result of the
attraction of the partial positive and partial negative charges on different water molecules
TRUE OR FALSE:
Bonds between hydrogen and carbon do not form significant partial charges because the electronegativities of the two atoms are similar
TRUE
TRUE OR FALSE:
Molecules containing many carbon-hydrogen bonds will not form
hydrogen bonds and therefore, do not mix well with water.
TRUE
TRUE OR FALSE
Hydrogen bonds are polar and are hydrophilic.
TRUE
Molecules possessing both hydrophilic and hydrophobic characteristics are called——————-
containing a long, non-polar aliphatic tail and a head that ionizes
amphiphilic
Weak interactions of electrons are called
Van der Waals forces
TRUE OR FALSE
In hydrogen bonding (X-H), X is always more elctronegative than H.
TRUE
Evidence of hydrogen bonding
Intermolecular forces: Boiling point and Freezing point
Low molecular forces
alkenes and alkanes (gases at room temp.)
TRUE OR FALSE
Dipole interactions are less powerful than Hydrogen Bonding.
TRUE
