CHEM 210- MODULE 2 EXAM QUESTIONSAND CORRECT ANSWERS, COMPLETE VERIFIED SOLUTION 2024.
What is an aqueous solution?
water-based environment
What is water made of?
non-metals (O and H) covalently bonded
Why can small non-metals form stable covalent bonds
Due to the significant overlap of the...
CHEM 210- MODULE 2 EXAM QUESTIONSAND
CORRECT ANSWERS, COMPLETE VERIFIED
SOLUTION 2024.
What is an aqueous solution?
water-based environment
What is water made of?
non-metals (O and H) covalently bonded
Why can small non-metals form stable covalent bonds
Due to the significant overlap of the atoms
What is the hybridization of H2O (2 bonding pairs 2 lone e pairs)
sp3
Is H2O a polar or nonpolar molecule?
polar
Name two other common polar molecules
glucose due to its OH
acetic acid due to its carbox acid
Name 2 common nonpolar compounds
cooking oil and bees wax
the polar nature of water permits it to dissolve other ____ molecules
polar
What is the autoionization?
the compounds ability to react with itself and form ions
When H2O reacts with H2O what are the products under autoionization?
H3O+ and OH-
higher melting point indicated that molecule has stronger _____
intramolecular forces
What is the melting point of H2O
0 deg celcius
What is the boiling point of H2O
100 deg Celsius
What is the heat of vaporization of H2O
540 cal/g
What is the melting point of Hydrogen Sulfide H2S
-82 deg C
What is the boiling point of hydrogen sulfide H2S
-60 deg C
What is the heat of vaporization of Hydrogen sulfide H2S
69 cal/g
What is the melting point of Hexane C6H14
-95 deg C
What is the boiling point of Hexane C6H14
69 deg C
What is the heat of vaporization of Hexane C6H14
, 88 cal/g
What is the melting point of carbon tetrachloride CCl4
-23 deg C
What is the boiling point of carbon tetrachloride CCl4
77 deg C
What is the heat of vaporization for carbon tetrachloride CCl4
47 cal/g
What are non-covalent forces
Forces that occur between two molecules
What are some examples of attractive forces
Water beading up on a waxed car
Oil and water separating in Italian dressing
Water bugs walking on water
Fat soluble vitamins dissolving in the cellular membrane
What are 3 examples of non-covalent forces
Dipole-dipole forces
Hydrogen bonding
London dispersion forces
What are dipole dipole interactions
when two molecules align their dipoles to generate an attraction
What are examples of molecules with dipole dipole interactions
acetone and glucose
What are the strongest of dipole dipole interactions
H- bonds
What two things must be present for H-bonds to occur
hydrogen atom must serve as hydrogen donor
hydrogen acceptor must be present
What are examples of H donors
O-H
N-H
F-H
What are examples of H acceptors
O-
N-
F-
What are the weakest non-covalent forces
London forces
What is the strength of London forces
<1 kcal
What is the strength of dipole dipole forces
0.5-2.0 kcal
What is the strength of H-Bonds
12-16 kcal
What is the strength of O-H covalent bond
400+ kcal
What is equilibrium
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