Use the data in Appendix L to determine the equilibrium constant for the following reactions. Assume 298.15 K if no temperature is given. (a) AgCl ( s ) ⇌ Ag + ( a q ) + Cl − ( a q ) (b) CdS ( s ) ⇌ Cd 2 + ( a q ) + S 2 ( a q ) t 377 k (c) Hg 2 + ( a q ) + 4 Br − ( a q ) ⇌ [ HgBr 4 ] 2 − ( a q ) (d) H 2 O ( l ) ⇌ H + ( a q ) + OH − ( a q ) at 25 °C
Use the data in Appendix L to determine the equilibrium constant for the following reactions. Assume 298.15 K if no temperature is given. (a) AgCl ( s ) ⇌ Ag + ( a q ) + Cl − ( a q ) (b) CdS ( s ) ⇌ Cd 2 + ( a q ) + S 2 ( a q ) t 377 k (c) Hg 2 + ( a q ) + 4 Br − ( a q ) ⇌ [ HgBr 4 ] 2 − ( a q ) (d) H 2 O ( l ) ⇌ H + ( a q ) + OH − ( a q ) at 25 °C
6. Match each of the lettered items in the column on
the left with the most appropriate numbered
item(s) in the column on the right. Some of the
numbered items may be used more than once
and some not at all.
a.
Z = 37
1.
b.
Mn
2.
C.
Pr
element in period 5 and group
14
element in period 5 and group
15
d. S
e. [Rn] 7s¹
f.
d block
metal
3. highest metallic character of all
the elements
4. paramagnetic with 5 unpaired
electrons
5. 4f36s2
6. isoelectronic with Ca²+ cation
7.
an alkaline metal
8. an f-block element
Draw all formal charges on the structures below as is and draw 1 resonance structure that is more stable.
Part II. xiao isolated a compound TAD (Ca H 10 N₂) from tobacco and obtained its IR spectrum. Xiao proposed
a chemical structure shown below:
% Transmittance
4000
3500
3000
2500 2000
Wavenumber (cm-1)
1500
1000
(a) Explain why her proposed structure is inconsistent with the IR spectrum obtained
(b) TAD exists as a tautomer of the structure xiao proposed. Draw the structure
and explain why it is more compatible with the obtained spectrum.
(C) what is the possible source for the fairly intense signal at
1621cm1
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