In the presence of NH 3 , Cu 2+ forms the complex ion Cu(NH 3 ) 4 2+ . If the equilibrium concentrations of Cu 2+ and Cu(NH 3 ) 4 2+ are 1.8 × 10 −17 M and 1.0 × 10 −3 M , respectively, in a 1.5- M NH 3 solution, calculate the value for the overall formation constant of Cu(NH 3 ) 4 2+ . Cu 2+ ( a q ) + 4 N H 3 ( a q ) ⇌ C u ( N H 3 ) 4 2 + ( a q ) K overall = ?
In the presence of NH 3 , Cu 2+ forms the complex ion Cu(NH 3 ) 4 2+ . If the equilibrium concentrations of Cu 2+ and Cu(NH 3 ) 4 2+ are 1.8 × 10 −17 M and 1.0 × 10 −3 M , respectively, in a 1.5- M NH 3 solution, calculate the value for the overall formation constant of Cu(NH 3 ) 4 2+ . Cu 2+ ( a q ) + 4 N H 3 ( a q ) ⇌ C u ( N H 3 ) 4 2 + ( a q ) K overall = ?
In the presence of NH3, Cu2+ forms the complex ion Cu(NH3)42+. If the equilibrium concentrations of Cu2+ and Cu(NH3)42+ are 1.8 × 10−17M and 1.0 × 10−3M, respectively, in a 1.5-M NH3 solution, calculate the value for the overall formation constant of Cu(NH3)42+.
Cu
2+
(
a
q
)
+
4
N
H
3
(
a
q
)
⇌
C
u
(
N
H
3
)
4
2
+
(
a
q
)
K
overall
=
?
If we assume a system with an anodic overpotential, the variation of n as a function
of current density:
1. at low fields is linear 2. at higher fields, it follows Tafel's law
Obtain the range of current densities for which the overpotential has the same value
when calculated for 1 and 2 cases (maximum relative difference of 5% compared to
the behavior for higher fields).
To which overpotential range does this correspond?
Data: i = 1.5 mA cm², T = 300°C, B = 0.64, R = 8.314 J K1 mol-1 and F = 96485 C mol-1.
Answer by equation please
Some of the theories used to describe interface structure can be distinguished by:1. the measured potential difference.2. the distribution of ions in solution.3. the calculation of charge density.4. the external Helmoltz plane.
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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