Grade 12 Chemistry (4)

advertisement
SCH4U – FINAL EXAM REVIEW
Chapter 1
1. Draw and name the family to which each of the following belongs: 6 marks
a) N,N-dimethyl-3-methylbutanamide
Family:_________________________
b)
3-chlorobutanoic acid
Family:__________________________
c)
4,5-dimethyl-2-heptanol
Family: __________________________
Chapter 3
3. a) Draw an orbital diagram for F -. 2 marks
b) Draw the condensed electron configuration for Selenium, Se. 2 marks
Chapter 4
4. Draw the Lewis structure for each of the following compounds/ions and predict the shape
using VESPR. 4 marks
a) CH2O
Shape: _______________________
b) SF6
Shape: _______________________
5. A metal, X, reacts with chlorine to form the compound XCl 2. The metal’s third ionization
energy is significantly larger than its first and second ionization energies. 2 marks
a) To what group does the metal likely belong?
b) What is the valence electron configuration of an atom of the metal in its ground state?
Chapter 5
6. Calculate Ho for the following reaction using the listed standard enthapy of reaction
data: 4 marks
2N2(g) + 5O2(g)
2N2O5(s)
N2(g) + 3O2(g) + H2(g)
2HNO3(aq)
Ho = -414.0 kJ
N2O5(s) + H2O(l)
2H2(g) + O2(g)
2HNO3(aq)
2H2O(l)
Ho = -86.0 kJ
Ho = -571.6 kJ
Chapter 6
7. Consider the following series of potential energy diagrams.
a) i) Which diagram represents the fastest reaction at room temperature? 1 mark
ii) Explain your choice. 1 mark
b) i) Which diagram represents the reaction of two solids at room temperature? 1 mark
ii) Explain your choice. 1 mark
Chapter 7
8. 0.440 mol/L of IBr is allowed to reach equilibrium, as shown below.
The equilibrium constant is 6.62 x 10 -3. What are the equilibrium concentrations?
6 marks
2IBr(g)  I2(g) + Br2(g)
2IBr(g)

+
I2(g)
Br2(g)
I
C
E
Chapter 8
9. Lactic acid, C3H6O3, builds up in human muscles during anaerobic exercise. If the initial
concentration of lactic acid is 0.12 mol/L and the pH is 2.39, what is Ka for lactic acid?
6 marks
C3H6O3(aq)
C3H6O3(aq)
I
C
E
+
H2O(l) 
+
H2O(l)
H3O+(aq) +

C3H5O3−(aq)
H3O+(aq)
+ C3H5O3−(aq)
Chapter 9
10. Calculate the molar solubility of CaF 2(s) in pure water given that the Ksp for CaF2 is 3.95 x 10-11.
4 marks
Chapter 10
11. Use this redox equation for a) through e). 6 marks
KMnO4 + HCl ➔ KCl + MnCl2 + Cl2 + H2O
a)
What is the oxidation number of Cl in Cl2? ______
b)
How does the oxidation number of Mn change in the reaction?
State the before and after oxidation numbers.
c)
Which reactant is the oxidizing agent? _________________
d)
What oxidation number would be assigned to O in H2O? ________
e)
How would this oxidation number change if the formula was H2O2?
Chapter 11
12. Use the following shorthand representation to sketch a galvanic cell. Include as much
information as you can. Identify the anode and cathode, and write the half-reaction and the
overall cell reaction. 5 marks
Zn(s) | Zn2+(aq) || Ag+(aq) | Ag(s)
HINT: in the shorthand representation the anode is always shown on the left.
Download
Related flashcards
Create Flashcards