To 0.350L of 0.150MNH 2 is added 0.150 L of 0.100 M MgCl 2 . How many grams of ( NH 4 ) 2 SO 4 should be present to prevent precipitation of Mg ( OH ) 2 ( s ) ?
To 0.350L of 0.150MNH 2 is added 0.150 L of 0.100 M MgCl 2 . How many grams of ( NH 4 ) 2 SO 4 should be present to prevent precipitation of Mg ( OH ) 2 ( s ) ?
Solution Summary: The author explains the calculation of the mass of (NH_ 4) and the dissociation of NH 3 in aqueous solution.
To 0.350L of 0.150MNH2 is added 0.150 L of 0.100 M
MgCl
2
. How many grams of
(
NH
4
)
2
SO
4
should be present to prevent precipitation of
Mg
(
OH
)
2
(
s
)
?
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
AE>AE₁ (Y/N)
AE=AE₁ (Y/N)
AE
Treatment of 2-phenylpropan-2-amine with methyl 2,4-dibromobutanoate in the presence of a nonnucleophilic base, R3N, involves two successive SN2 reactions and
gives compound A.
?
NH2
Br
Br
Propose a structural formula for compound A.
You do not have to explicitly draw H atoms.
You do not have to consider stereochemistry.
In cases where there is more than one answer, just draw one.
R3N
C14H19NO2
+ 2 R3NH*Br
A
Chapter 18 Solutions
General Chemistry: Principles and Modern Applications (11th Edition)
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