Antifreeze solutions are aqueous solutions of ethylene glycol, C 2 H 6 O 2 ( d = 1.12 g / mL ) . In Connecticut, cars are "winterized" by filling radiators with an antifreeze solution that will protect the engine for temperatures as low as -20°F. (a) What is the minimum molality of antifreeze solution required? (b) How many milliliters of ethylene glycol need to be added to 250 mL of water to prepare the solution called for in (a)?
Antifreeze solutions are aqueous solutions of ethylene glycol, C 2 H 6 O 2 ( d = 1.12 g / mL ) . In Connecticut, cars are "winterized" by filling radiators with an antifreeze solution that will protect the engine for temperatures as low as -20°F. (a) What is the minimum molality of antifreeze solution required? (b) How many milliliters of ethylene glycol need to be added to 250 mL of water to prepare the solution called for in (a)?
Solution Summary: The author explains that the minimum molality of anti-freezing solution is 15.59 m.
Antifreeze solutions are aqueous solutions of ethylene glycol,
C
2
H
6
O
2
(
d
=
1.12
g
/
mL
)
. In Connecticut, cars are "winterized" by filling radiators with an antifreeze solution that will protect the engine for temperatures as low as -20°F.
(a) What is the minimum molality of antifreeze solution required?
(b) How many milliliters of ethylene glycol need to be added to 250 mL of water to prepare the solution called for in (a)?
Part II. Given two isomers: 2-methylpentane (A) and 2,2-dimethyl butane (B) answer the following:
(a) match structures of isomers given their mass spectra below (spectra A and spectra B)
(b) Draw the fragments given the following prominent peaks from
each spectrum:
Spectra A m/2 =43 and 1/2-57
spectra B m/2 = 43
(c) why is 1/2=57 peak in spectrum A more intense compared
to the same peak in spectrum B.
Relative abundance
Relative abundance
100
A
50
29
29
0
10
-0
-0
100
B
50
720
30
41
43
57
71
4-0
40
50
60 70
m/z
43
57
8-0
m/z = 86
M
90 100
71
m/z = 86
M
-O
0
10 20 30
40 50
60
70
80
-88
m/z
90
100
Part IV. C6H5 CH2CH2OH is an aromatic compound which was subjected to Electron Ionization - mass
spectrometry (El-MS) analysis. Prominent m/2 values: m/2 = 104 and m/2 = 9) was obtained.
Draw the structures of these fragments.
For each reaction shown below follow the curved arrows to complete each equationby showing the structure of the products. Identify the acid, the base, the conjugated acid andconjugated base. Consutl the pKa table and choose the direciton theequilibrium goes. However show the curved arrows. Please explain if possible.
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.