Unit 1
Copper
What would the hybridization be for either carbon in C2H4? Additionally, provide the number of sigma and pi bonds present.
sp2
5 sigma bonds and 1 pi bond
CH4: LDF
CH3OH: LDF and hydrogen bonding
Calculate the molarity of a 750mL made from 67g of NaCl.
1.53M
What is the only letter of the alphabet that DOESN'T appear on the periodic table?
J (also accept Q, but it used to be there for Uuq)
Vanadium is know to ionize to multiple different ions, what would its electron configuration be for the atom in its ground state, at +3 and at +5?
[Ar]4s2 3d3
[Ar]4s2
[Ne]3s2 3p6
Draw the Lewis Structure for SF4 and identify its geometry.
Seesaw
Use Figure 4 to order the colors from least to most polar. Consider that you used a polar stationary phase and nonpolar solvent.
Zn(s) +Cu^2+(aq) -->Zn^2+(aq) + Cu(s)
What species is being oxidized?
Zinc
Using Figure 2, identify the element that is being shown and what direction would the left most peak shift if the protons were increased by two.
Phosphorus and the peak would shift to the left
Use formal charges to determine which structure from Figure 3 is more valid.
Structure 2
A student wants to use a spectrometer to determine the concentration of an unknown sample of CuSO4. They collect data on multiple different samples with a known concentration and then test the unknown. When analyzing the sample, they realize one of the known samples has a much larger absorbance then it should. Purpose as many reasons for this occurance.
Write the balanced reaction between NaOH and HCl
NaOH + HCl --> H2O + NaCl
Using the principles of atomic structure, explain why MgO (boiling point: 2852) has a higher boiling point then NaF (boiling point: 993).
If you don't use Coulombs Law you are WRONG!
116pm due to resonance
Would NH3 deviate from ideal conditions more at low pressure or high pressure, explain?
Would H2S deviate from ideal conditions more at low temperature or high temperature, explain?
High Pressure
Low Temp
Write the balance equation between AgNO3 and CaCl2. As the reaction proceeds, predict whether the conductivity of the solution will increase, decrease or stay the same?
AgCl, and decrease
What color is liquid oxygen?
Blue
A student is tasked with determining the empirical formula of a hydrate of Magnesium Sulfate, MgSO4 xH20. The student heats a 2.50 g sample of the hydrate in a crucible until all the water of hydration is driven off. The mass of the anhydrous MgSO4 remaining is 1.22g.
Calculate the formula of the hydrate.
MgSO4 7H20
DI water has no charged particles within it. Once NaCl is added, their are charged particles that allow for the movement of electricity.
Explain a scenario where a molecule with only LDFs could have a higher boiling point then one with Hydrogen Bonding
The molecule would have to be very large
2Al(s) + 3I2(g) --> 2AlI3(s)
A student places 4.00 g of Al(s) (molar mass 26.98 g/mol) in a container with 40.00g of I2(g) (molar mass 253.80 g/mol).
Calculate the maximum mass, in grams, of AlI3(s) (molar mass 407.68 g/mol) that can be produce. After the reaction is complete, the student recovers 35.50 g of AlI3. Calculate the percent yield. If the reaction were performed with aluminum powder instead of aluminum foil, would the theoretical yield change? Justify your answer.
I2 limiting
82.67%
No different
Who is considered the Father of Modern Chemistry?
Antoine Lavoisier