When two cotton plugs. one moistened with ammonia and the other with hydrochloric acid, are simultaneously inserted into opposite ends of a glass tube that is 87.0 cm long, a white 1111g of NH 4 Cl forms where gaseous NH 3 and gaseous HC1 first come into contact. NH 3 ( g ) + HCl ( g ) → NH 4 Cl ( s ) At approximately what distance from the ammonia moistened plug does this occur? (Hint: Calculate the rates of diffusion for both NH 3 and HCI, and find out how much faster NH 3 diffuses than HCI.)
When two cotton plugs. one moistened with ammonia and the other with hydrochloric acid, are simultaneously inserted into opposite ends of a glass tube that is 87.0 cm long, a white 1111g of NH 4 Cl forms where gaseous NH 3 and gaseous HC1 first come into contact. NH 3 ( g ) + HCl ( g ) → NH 4 Cl ( s ) At approximately what distance from the ammonia moistened plug does this occur? (Hint: Calculate the rates of diffusion for both NH 3 and HCI, and find out how much faster NH 3 diffuses than HCI.)
When two cotton plugs. one moistened with ammonia and the other with hydrochloric acid, are simultaneously inserted into opposite ends of a glass tube that is 87.0 cm long, a white 1111g of
NH
4
Cl
forms where gaseous
NH
3
and gaseous HC1 first come into contact.
NH
3
(
g
)
+
HCl
(
g
)
→
NH
4
Cl
(
s
)
At approximately what distance from the ammonia moistened plug does this occur? (Hint: Calculate the rates of diffusion for both
NH
3
and HCI, and find out how much faster
NH
3
diffuses than HCI.)
The structure of compound 1,3,5-trimethylbenzene (mesitylene) is given below.
How many signals would you expect to find in the 'H NMR spectrum of 1,3,5-trimethylbenzene (mesitylene)?
Check
×
1
How many signals do you expect in the 'H NMR spectrum for this molecule?
CI CI
Cl
Write the answer in the table below.
Also, in each of the drawing areas below is a copy of the molecule, with H atoms shown. In each copy, one of the H atoms is highlighted red. Highlight in red all
other H atoms that would contribute to the same signal as the H already highlighted red.
Note for advanced students: Remember, a multiplet is considered one signal in the 'H NMR spectrum.
1
Number of signals in the 'H NMR spectrum.
☐
For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to the same
signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
No additional H atoms to highlight in
top molecule
For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute to the
same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at…
wrtie the balanced equation and find the E° when the following half- reactions are combined
Zn2+(aq) + 2e---> Zn(s) E°= -0.763V
Ag+(aq) + e---> Ag (s) E°=+0.799V
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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