MO Theory
Which MO Diagram for second row diatomic molecules should you use? (B, C, N or O, F, Ne)
Use the O, F, Ne MO diagram unless told otherwise
What is the hybridization of the central nitrogen in ammonia?
What equation is used to calculated dilutions?
C1V1 = C2V2
What is an Empirical Formula?
The chemical formula with the lowest whole number ratios.
What is the following reaction?
CaCO3 (s) -> CaO(s) + CO2(g)
Decomposition
Draw the MO diagram for H2
H2: sigma(1s)2
What is the purpose of hybridized orbitals?
So that the geometries of VESPR can actually be created. The and d atomic orbitals do not lend themselves to VESPR geometries.
What is the concentration of a solution if 1.5 g of sodium iodide was added to 25 mL of ethanol?
0.40 M
What is the molecular formula if the ratio of molecular and empirical molar mass is 2 and the empirical formula is C4H5N2O?
C8H10N4O2 (Caffeine)
Balance the following reaction.
C10H8(s) (naphthalene) + O2(g) -> CO2(g) + H2O(g)
C10H8(s) + 12O2(g) -> 10CO2(g) + 4H2O(l)
What type of bond has a bond order of 2?
Double bond!
What is the geometry of sp3d hybridization?
Trigonal Bi-Pyramidal
What is the ppm concentration of calcium ion in 0.01M CaCO3? Assume the density of the solvent is 1 g/mL.
400ppm
What is the percent composition of Nitrogen in lidocaine, C14H22N2O?
12%
What products are made by the mixing of potassium sulfate and barium nitrate?
KNO3(aq) and BaSO4(s)
What are antibonding orbitals?
Regions of electron density that contribute against bonding by destabilizing them.
Label all the unique hybridized orbitals in caffeine.
Carbon is either sp3 or sp2
Nitrogen is also either sp3 or sp2
If volumes are additive and 95.0 mL of 0.55 M KBr is mixed with 165.0 mL of a BaBr2 solution to give a new solution in which [Br¯] is 0.65 M, what is the concentration of the BaBr2 used to make the new solution?
0.35 M
A 10.00 g sample of vitamin C was analyzed and found to contain 4.092 g of C, 0.458 g of H, and 5.450 g of O. Given that the molar mass of the compound is 176g, determine the molecular formula of vitamin C.
C6H8O6
What are the oxidation numbers of all species present? Does a Redox reaction occur?
Fe2O3(s) + 2Al(s) -> Al2O3(s) + 2Fe(l)
Yes a Redox reaction occurs.
Reactants: Fe: +3, O: -2, Al: 0
Products: Al: +3, O: -2, Fe: 0
What has the highest bond order: CO-, CO, CO+
CO
Label all the unique hybridized orbitals in the given compound.
sp, sp2, sp3, sp3d
100.0 mL of a 2.0 M solution of NaCl is added to 50.0 mL of a 1.50 M solution of CaCl2 and then diluted to a final volume of 300 mL. What is the final concentration of chloride anions?
1.17 M
Determine the empirical and molecular formula of a compound containing: 29.2% N, 8.3% H, 12.5% C, and 50.0 % O and a molecular molar mass of 288.26 g/mol.
CH8N2O3 - Empirical
C3H24N6O9 - Molecular
Watch the video linked in the chat. What kind of reaction do you think is occurring?
Redox!
2 Mg (s) + CO2 (g) -> 2 MgO (s) + C (s)