All Questions
Tagged with equilibrium stoichiometry
33
questions
2
votes
2
answers
147
views
Find the added volume of HCl so that the ions separate
Suppose we have a 10mL solution that contains 0.02M $\ce{Ag^+}$ and 0.04M $\ce{Ba^{2+}}$. a) Find the necessary volume to be added of $\ce{HCl}$ to separate all the silver. (Assume to be separated if ...
- 53
1
vote
1
answer
80
views
What is the difference between a single displacement reaction and a two competing reaction system?
For example, consider the single-displacement reaction
$$\ce{AB + C <=> BC + A}$$
My question is then if writing this reaction as the system
\begin{gather}
\ce{AB <=> A + B} \\
\ce{B + C &...
0
votes
2
answers
2k
views
How much Na2O (from NaOH) do I add to sodium silicate with a weight ratio of SiO2/Na2O = 2.34 to get the solution to a weight ratio SiO2/Na2O = 1.9?
There is some confusion in industry as sodium silicate is made with NaOH but given a ratio with respect to Na2O (i.e. SiO2/Na2O not SiO2/NaOH). I presume it follows from this equation:
2NaOH -> ...
- 500
0
votes
1
answer
843
views
How is the equilibrium constant for the water-gas shift reaction calculated after it is disturbed?
Consider the following equilibrium process at $\pu{686 ^\circ C}$:
$$\ce{CO2(g) + H2(g) <=> CO(g) + H2O(g)}$$
The equilibrium concentrations of the reacting species are $[\ce{CO}] = \pu{0.050 M}$...
1
vote
1
answer
49
views
Reaction stoichiometry for calculation of Kp
NH$_2$CO$_2$NH$_4$(s)⇌$2$ NH$_3$(g)+ CO$_2$(g)
I want to calculate K$_p$ for the reaction above, given that the total pressure is $0.63$ bar.
My calculations:
$0.63$ = p(CO$_2$) + p(NH$_3$)
, where ...
- 1,095
5
votes
1
answer
552
views
What does the equilibrium constant mean for reactions with very small concentrations?
When you calculate the equilibrium constant for a reaction with a higher concentration of reactants, the answer is fairly intuitive. For example, for the reaction:
$$\ce{A + B <=> C}$$
when we ...
- 51
3
votes
2
answers
1k
views
Dissolution of iron(III) hydroxide
Problem
From the theoretical tour of the Mendeleev Olympiad in Chemistry:
a) Calculate the minimal amount of sulfuric acid that should be diluted with water to yield $\pu{100 mL}$ of solution that ...
1
vote
0
answers
65
views
Question on chemical equilibrium [closed]
8 moles of so2 and 4 moles of O2 are mixed in a closed vessel.the reaction proceeds at constant temperature. By the moment when equilibrium sets in,80% of the initial amount of so2 enters into the ...
- 111
1
vote
0
answers
703
views
Why are the equilibrium exponents stoichiometric when the rate law's are not? [duplicate]
I'm learning about rate law and equilibrium, and the textbook really hammers in that the exponents for the rate law must be determined experimentally - you can't just use the coefficients from the ...
- 119
-1
votes
1
answer
2k
views
How to calculate the equivalent mass of Na2S2O3? [closed]
Let us consider the following reaction
$$\ce{I2 + 2 Na2S2O3 -> 2 NaI + Na2S4O6}$$
Now, in order to calculate the equivalent mass of $\ce{Na2S2O3}$, first I need to calculate it's $n$-factor which ...
- 992
0
votes
1
answer
5k
views
How to calculate the equivalent weight of KMnO4?
Let us consider the following reaction
$$\ce{2 KMnO4 + 16 HCl → 2 KCl + 2 MnCl2 + 8 H2O + 5 Cl2}$$
Now, in order to calculate the equivalent mass of $\ce{KMnO4}$, first I need to calculate it's $n$-...
- 123
2
votes
0
answers
127
views
Stoichiometry based on addition of simultaneous equilibria
I read on another equilibrium question that if two equilibria occur at the same time, then it is not accurate with actual stoichiometry to add the two equations and multiply the equilibrium constants $...
- 21
0
votes
2
answers
3k
views
Derivation of Gibbs free energy formula
Okay, so I'm trying to derive an important formula which states that -
∆G(r) = ∆G° + RTln( RQ )
where ∆G(r) is the instantaneous rate of change of Gibbs energy with ...
- 242
-2
votes
1
answer
1k
views
How to calculate the equilibrium constant for nitrogen, hydrogen, and ammonia?
$\pu{2 mol}$ of $\ce{N2}$ is mixed with $\pu{6 mol}$ of $\ce{H2}$ in a closed vessel of $\pu{1 L}$ capacity. If $50\%$ of $\ce{N2}$ is converted into $\ce{NH3}$ at equilibrium, what is the value of $...
- 29
1
vote
2
answers
212
views
Weight of sodium acetate required to get to certain pH
How many grams of $\ce{CH3COONa}$ we need to dissolve in $\pu{2.50 L}$ of water to get a solution with $\mathrm{pH} = 9.00$? Given $K_\mathrm{a}(\ce{CH3COOH}) = 1.75\cdot 10^{-5}$
Like solving a ...
- 305