All Questions
Tagged with equilibrium inorganic-chemistry
28
questions with no upvoted or accepted answers
3
votes
0
answers
270
views
Is dehydration of cobalt(II) chloride hexahydrate dynamic equilibrium?
I know that the dehydration of cobalt(II) chloride hexahydrate is a reversible reaction, is it a dynamic equilibrium?
$$
\begin{align}
\ce{CoCl2·6H2O &<=> CoCl2·2H2O + 4 H2O}\tag{R1}\\
\ce{...
- 31
2
votes
0
answers
78
views
Does copper(II) hydroxide dissolve in ammonia solution?
According to University of Oregon — Chemistry Interactive Demonstrations and Educational Resources — Copper-Ammonia Complex, the equilibrium constant for the formation of copper(II) hydroxide is ...
- 620
2
votes
0
answers
58
views
Phase diagram of ammonium hydrosulfide, a volatile salt
Salts (ionic compounds) usually have low volatility due to the strong ionic bond.
However, there are exceptions. Smelling salts decompose and release ammonia gas.
What is "volatile"?
If a ...
- 972
2
votes
0
answers
56
views
Calculating the solubility for chromium(III) hydroxide using the complex ion constant
Problem
$$
\begin{align}
\ce{Cr(OH)3(s) &<=> Cr^3+(aq) + 3 OH-(aq)} &\quad K_\mathrm{sp} &= \pu{6.7E-31} \\
\ce{Cr^3+(aq) + 4 OH-(aq) &<=> Cr(OH)4-(aq)} &\quad K_\...
- 31
2
votes
0
answers
36
views
Why isn't the chemistry of a zinc-air battery (meaningfully) hindered by an activation energy barrier?
Virtually every source I've read pertaining to zinc-air batteries explain the chemistry of it either using these formulae or a simplified version of them:
$$
\begin{align}
&\text{Anode:} &\...
- 139
2
votes
0
answers
269
views
Amount of benzoic acid required to alter pH of a NaOH-solution
I am trying to do a practice problem but I can't figure it out:
How many grams of benzoic acid needs to be added to 0.10 l of a NaOH-solution with a concentration of 1.0 mM to reduce the pH of said ...
- 51
1
vote
0
answers
485
views
Equivalence point pH derivation of a tribasic acid
Considering $\pu{100 mL} \ \pu{0.1 M} \ \ce{H3A}$ and $\pu{0.1 M} \ \ce{NaOH}$ titration curve:
I understood the half equivalence points, but couldn't understand the reason why $\mathrm{pH} = \frac{1}...
- 412
1
vote
0
answers
38
views
Chemical equilibrium of inorganic complexes
After mixing Cobalt(II) Chloride hexahydrate with ammonium chloride a violet complex forms, what would be the complex formed?
It was the precursor for producing hexamine cobalt chloride so I didn't ...
1
vote
0
answers
72
views
Hydrogen disulfide heterogenous equilibrium
Hydrogen sulfide can be removed from natural gas by the reaction
$$\ce{2 H2S(g) + SO2(g) -> 3 S(s) + 2 H2O(g)}$$
a) Calculate $ΔG^\circ$ and $K$ for this reaction at $\pu{298 K}.$
b) What is the ...
- 605
1
vote
0
answers
77
views
Why do diplumbenes (Pb=Pb double bonded compounds) break apart in hydrocarbon solution?
In group 14, the double bond becomes increasingly weaker down the group. Our lecturer told us that many distannenes ($\ce{>Sn=Sn<}$) and almost all diplumbenes ($\ce{>Pb=Pb<}$) dissociate ...
- 5,685
1
vote
0
answers
108
views
Finding ionic radii from solubility data and density
$\pu{5.35 g}$ of a salt $\ce{ACl}$ is dissolved in $\pu{250 ml}$ of solution. The $\mathrm{pH}$ of the resultant solution was found to be $4.85.$ Find the ionic radius of $\ce{A+}$ and $\ce{Cl-}$ if ...
1
vote
0
answers
57
views
Calculating thermodynamic quantities for hydrogenation of iron nitride
HW#6.3 If the reaction
$$\ce{Fe2N(s) + 3/2 H2(g) <=> 2 Fe(s) + NH3(g)}$$
comes to an equilibrium at a total pressure of $\pu{1 bar},$ analysis of the gas shows that at $\pu{700 K}$ and $\pu{800 ...
1
vote
0
answers
773
views
Solubitity of FeS
I have some questions related to a problem of multiple equilibria and solubility. I have to calculate the solubility of FeS in pure water considering that the second stage of hydrolisis of $\ce{S^2-}$,...
- 39
1
vote
0
answers
114
views
Is it true that un-dissociated HCl exists in dilute hydrochloric acid?
My book says that the equilibrium constant for $\ce{HCl + H_2O}$ is so high that the reaction goes to completion. But that does not make sense since the existence of an equilibrium constant for this ...
- 333
1
vote
0
answers
258
views
Buffer (buffer capacity)
I know that there already exist multiple questions concerning buffers and buffer capacities, but I would nevertheless like to clarify two things with your help:
Adding to a buffer $n$ moles of an ...
- 111