Reslan F23 Midterm 2 Chem 14A
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23F-CHEM-14A-LEC-1 Midterm 2
TOTAL POINTS
47.5 / 50
QUESTION 1
1 Q1 3 / 5
✓
+ 3 pts explains trend with ionization energy
increasing as you go right on periodic table. Must at
least have Na as lowest and Si as highest i
+ 1 pts totally correct order of ionization enegy
(Na < Al < Mg < Si)
+ 1 pts proper description of why Mg has a
higher ionization energy than Al
+ 0 pts incorrect
QUESTION 2
2 Q2 4.5 / 5
✓
+ 2 pts understands that atomic radius increases
to left and down
✓
+ 1 pts states that if electron count is equal, more
protons contribute to a smaller atomic radius
+ 2 pts correct order Se > S > Cl > K
+ 1 pts partially correct in explaining Atomic
radius increases to the left and down on the
periodic table.
+ 0 pts incorrect order
✓
+ 1.5 pts 3 out of 4 correct
+ 1 pts order half correct
+ 0.5 pts only one correct
QUESTION 3
Q3
10 pts
3.1 0.5 / 0.5
✓
+ 0.5 pts 4
+ 0 pts Incorrect
3.2 0.5 / 0.5
+ 0 pts Incorrect
✓
+ 0.5 pts 4
3.3 0.5 / 0.5
+ 0 pts Incorrect
✓
+ 0.5 pts 3
3.4 0.5 / 0.5
+ 0 pts Incorrect
✓
+ 0.5 pts 4
3.5 0.5 / 0.5
+ 0 pts Incorrect
✓
+ 0.5 pts sp3
3.6 0.5 / 0.5
+ 0 pts Inorrect
✓
+ 0.5 pts sp3
3.7 0.5 / 0.5
+ 0 pts sp2
✓
+ 0.5 pts sp2
3.8 0.5 / 0.5
+ 0 pts sp3
✓
+ 0.5 pts sp3
3.9 0.5 / 0.5
+ 0 pts tetrahedral
✓
+ 0.5 pts tetrahedral
3.10 0.5 / 0.5
+ 0 pts tetrahedral
✓
+ 0.5 pts tetrahedral
3.11 0.5 / 0.5
+ 0 pts trigonal planar
✓
+ 0.5 pts trigonal planar
3.12 0.5 / 0.5
+ 0 pts tetrahedral
✓
+ 0.5 pts tetrahedral
3.13 0.5 / 0.5
+ 0 pts trigonal pyramidal
✓
+ 0.5 pts trigonal pyramidal
3.14 0.5 / 0.5
+ 0 pts tetrahedral
✓
+ 0.5 pts tetrahedral
3.15 0.5 / 0.5
+ 0 pts trigonal planar
✓
+ 0.5 pts trigonal planar
3.16 0.5 / 0.5
+ 0 pts bent
✓
+ 0.5 pts bent
3.17 0.5 / 0.5
+ 0 pts < 109.5 or ~ 109.5
✓
+ 0.5 pts < 109.5 or ~ 109.5
3.18 0.5 / 0.5
+ 0 pts 109.5
✓
+ 0.5 pts 109.5
3.19 0.5 / 0.5
+ 0 pts 120
✓
+ 0.5 pts 120
3.20 0.5 / 0.5
+ 0 pts < 109.5 or ~ 109.5
✓
+ 0.5 pts < 109.5 or ~ 109.5
QUESTION 4
4 Q4 6 / 6
✓
+ 1 pts Correct CO2 Structure
✓
+ 1 pts Correct XeF2 Structure
✓
+ 0.5 pts C=O σ
(C sp + O sp2)
✓
+ 0.5 pts C=O π
(C 2p + O 2p)
✓
+ 0.5 pts CO2 Nonpolar
✓
+ 0.5 pts XeF2 Nonpolar
✓
+ 2 pts Correct explanation
+ 1 pts Partially Correct Explanation
+ 0 pts Incorrect
QUESTION 5
5 Q5 8 / 8
✓
+ 4 pts demonstrates that K3PO4 will ionize into 3
equivalents of K+ and 1 equivalent PO4^3-
✓
+ 4 pts correct calculation for dilution from 1 to 3
liters and calculated concentration of both K and
PO4
+ 0 pts incorrect/incomplete
+ 2 pts correct of concentration of one of either
K or PO4
+ 3 pts correct calculations but not in Molar
form
QUESTION 6
6 Q6 8 / 8
✓
+ 1 pts **Correct Mole Ratio / Balanced Equation
(2 HNO3 + Na2CO3 →
CO2 + H2O + 2 NaNO3)**
✓
+ 1 pts **Correct kg-g conversion (or used
kmole)**
✓
+ 2 pts **Correct HNO3 Mole Conversion**
✓
+ 2 pts **Correct Na2CO3 Conversion**
+ 1 pts Partially Correct HNO3 Mole Conversion
+ 1 pts Partially Correct Na2CO3 Mole
Conversion
+ 1 pts On the right track with Mole Conversions
✓
+ 2 pts **No, there is not enough (LR =
Na2CO3)**
+ 1 pts LR correct OR answered No.
+ 1 pts On the right track
+ 0 pts Incorrect
QUESTION 7
7 Q7 8 / 8
✓
+ 8 pts All Correct
+ 7 pts Everything's correct except finding the
molecular formula
+ 5 pts Finding correct amount of all elements
+ 1 pts Finding correct amount of carbon
+ 1 pts Finding correct amount of hydrogen
+ 1 pts Finding correct amount of nitrogen
+ 2 pts Finding correct amount of oxygen
+ 2 pts nice try
+ 0 pts $$\space$$
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