A certain alcoholic beverage contains only ethanol ( C 2 H 6 O ) and water. When a sample of this beverage undergoes combustion, the ethanol burns hut the water simply evaporates and is collected along with the water produced by combustion. The combustion reaction is C 2 H 6 O ( l ) + 3O 2 ( g ) → 2 CO 2 ( g ) + 3H 2 O ( g ) When a 10.00 g sample of this beverage is burned, 11.27 gof water is collected. What is the mass in grams of ethanol,and what is the mass of water in the original sample?
A certain alcoholic beverage contains only ethanol ( C 2 H 6 O ) and water. When a sample of this beverage undergoes combustion, the ethanol burns hut the water simply evaporates and is collected along with the water produced by combustion. The combustion reaction is C 2 H 6 O ( l ) + 3O 2 ( g ) → 2 CO 2 ( g ) + 3H 2 O ( g ) When a 10.00 g sample of this beverage is burned, 11.27 gof water is collected. What is the mass in grams of ethanol,and what is the mass of water in the original sample?
Solution Summary: The author explains the relation between number of moles, mass and molar mass.
A certain alcoholic beverage contains only ethanol
(
C
2
H
6
O
)
and water. When a sample of this beverage undergoes combustion, the ethanol burns hut the water simply evaporates and is collected along with the water produced by combustion. The combustion reaction is
C
2
H
6
O
(
l
)
+
3O
2
(
g
)
→
2 CO
2
(
g
)
+
3H
2
O
(
g
)
When a 10.00 g sample of this beverage is burned, 11.27 gof water is collected. What is the mass in grams of ethanol,and what is the mass of water in the original sample?
Use solubility rules to provide balance molecular equation, total, and net ionic equation
Br
HO
?
HO
✓
OH
Use the literature Ka value of the acetic acid, and the data below to answer these questions. Note: You will not use the experimental titration graphs to answer the questions that follow.
Group #1:
Buffer pH = 4.35
Group #2:
Buffer pH = 4.70
Group #3:
Buffer pH = 5.00
Group #4:
Buffer pH = 5.30
Use the Henderson-Hasselbalch equation, the buffer pH provided and the literature pKa value of acetic acid to perform the following:
a) calculate the ratios of [acetate]/[acetic acid] for each of the 4 groups buffer solutions above.
b) using the calculated ratios, which group solution will provide the best optimal buffer (Hint: what [acetate]/[acetic acid] ratio value is expected for an optimal buffer?)
c) explain your choice
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell