Ionic and Molecular Compounds
What is the molecular name for CO2
Carbon Dioxide
How many total electrons are distributed in the Lewis structure for H2O?
8 electrons (2 from H + 6 from O)
What is the bond angle of a trigonal planar molecule?
120 Degrees
What is the strongest force between molecules?
Hydrogen Bonds
Balance the following reaction:
H2 + O2 --> H2O
2H2 + O2 --> 2H2O
What is the name of the following compound:
Na2O
Sodium Oxide
Draw a lewis structure for water, include non bonding electrons and dipoles.
board.
What is the noble gas electron configuration of Iodine (Atomic #53)?
[Kr]5s24d105p5
In order to form a hydrogen bond you need:
a ______ bonded to a hydrogen and a lone pair on a different ______
F, O, or N; F, O, or N
In a redox reaction, the substance being oxidized:
a. Gains electrons
b. Loses electrons
Loses electrons
LEO the lion says GER
OIL RIG
A polar covalent bond has electronegativity between values of ___ and ___.
(0.5 - 1.8)
How many lone electrons are there on the central S atom of SCl2?
4 electrons, two lone pairs
What is the molecular geometry of a molecule with 3 bonded group and a lone pair?
Trigonal Pyramidal
What intermolecular forces are present in a pure mixture of liquid water?
Dispersion, dipole-dipole, hydrogen bonding
Is the following an oxidation or reduction half reaction?
O2(s) + 4e- --> 2O2- (s)
Reduction
O2 gains four electrons
Reduction is gain
Gain Electrons Reduction
What is the name of the following compound:
Hg2SO4
Hg is mercuryMercury (I) Sulfate
There are a few exceptions to the octet rule when drawing Lewis structures:
Boron (B): Requires __ electrons and forms __ bonds
Beryllium (Be): Requires __ electrons and forms __ bonds
Boron: 6 electrons, 3 bonds
Beryllium: 4 electrons, 2 bonds
A molecule has bond angles of about 109 degrees and two of its electron groups are lone pairs. What is the shape of the molecule?
Bent
Rank the following from lowest to highest melting points: H2O, H2, NH3.
H2 > HCl > H2O
H2: Dispersion
HCl: Dispersion, Dipole-Dipole
H2O: Dispersion, Dipole-Dipole, Hydrogen Bonding
Combustion reactions always have two products. What are those?
CO2 and H2O
A student is given a molecule involving two bonded atoms. The electronegativity of the first atom is 0.93, and the second one has an electronegativity value of 3.16. What kind of bond is formed between the two?
Ionic (Electronegativity difference greater than 1.9)
What types of bonds are present in the Lewis Structure for HCN? Single, Double, Triple? How many lone pairs?
One single bond, one triple bond, one lone pair.
What is the electron geometry, molecular shape, and bond angles of NH3?
Electron geometry - Tetrahedral
Molecular shape - trigonal pyramidal
Bond angle - 109 degrees
Which of the following is affected by intermolecular forces?
a. Bond length within one molecule
b. Weight of molecules
c. Boiling points
d. Dipoles and polarity within one molecule
Boiling points
Which information is not conveyed by a balanced chemical reaction?
Physical states of reactants and products
Symbols and formula of substances involved
Number of atoms of reactants and products formed
Arrow that shows if reaction is feasible or not
Arrow that shows if reaction is feasible or not