All Questions
Tagged with equilibrium stoichiometry
33
questions
2
votes
1
answer
2k
views
Mixing Ca(OH)2 with Ca(NO3)2
Mixing $\ce{Ca(OH)_2}$ with $\pu{0.1 M}$ concentration of $\ce{Ca(NO3)2}$.
What will actually happen in the process? What I will see with my eyes? I know that $\ce{Ca^2+}$ cation with concentration ...
- 305
-1
votes
1
answer
57
views
Can i calculate the solution of the problem in more simple way?
and i got a serious question. During my exercises at home, i found that im struggling a lot while solving simple problem`s like this one:
I have an aquatic substance with 0.100 M of $\ce{Mg(NO3)2}$ ...
- 305
2
votes
1
answer
275
views
Grams of bicarbonate vs realeased CO2?
So, it's been a good two years since I've done chemistry and I have my first university lab in a few days and I'm sort of freaking out because I can't even remember how to do stoichiometry properly. ...
0
votes
2
answers
2k
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Why is the rate of a reaction proportional to the concentrations of reactants raised to their stoichiometric coefficients?
Consider a gaseous state elementary reaction $$\ce{aA(g) + bB(g)} \overset{k_\mathrm{f}}{\underset{k_{\mathrm{b}}}{\ce{<=>}}}\ce{ cC(g) + dD(g)}$$
I know that for this reaction, $$\Delta G = \...
- 1,278
0
votes
1
answer
273
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Why doesn't hydroxide concentration equal concentration of carbonic acid and bicarbonate in a sodium bicarbonate solution?
To find the pOH of solution of $\pu{0.42 M}$ of $\ce{NaHCO3}$, given a $\ce{Kb}$ of $\pu{2.4E-8}$, my solution manual does the following steps:
Reaction is similar to : $\ce{HCO3- + H2O <=> ...
- 2,853
3
votes
3
answers
356
views
What is the best approach to balance this equation? Why I cannot do it efficiently?
What is the best approach to balance this equation?
$$\ce{CO2 + H2O <--> C2H2 + O2}$$
I did it at first this way and I was not successful:
\begin{align}
\ce{4CO2 + H2O &<--> C2H2 + ...
- 85
3
votes
0
answers
2k
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Why are the stoichiometric coefficients used as exponents in the chemical equilibrium constant?
From what I can ascertain, the formulation of the chemical equilibrium constant is somewhat arbitrary. I don't understand the motivation for putting the stoichiometric coefficients in the exponents. ...
- 31
0
votes
1
answer
1k
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How do I calculate the number of molecules in an equilibrium depending on a change in the equilibrium constant? [closed]
Consider 1000 molecules of $\ce{A}$ and 1000 molecules of $\ce{B}$ in a eucaryotic cell. The concentration of both will be about $\pu{10^-9 M}$.
If the equilibrium constant $K$ for $\ce{A + B <--&...
- 19
4
votes
2
answers
426
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Given an unbalanced chemical equation, is it possible to determine the largest possible coefficient that could be used in the balanced equation?
I am writing a program to balance chemical equations, and would love to know if there is an algebraic way to determine the greatest possible coefficient that I would need to check.
- 41
4
votes
1
answer
451
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Why does multipying a scalar in both sides of a balanced chemical equation, change related quantities?
Stoichiometric coefficients appearing in a balanced chemical equation are unrelated to the actual concentration of reactant/products at any stage of a chemical reaction. They give information only ...
- 151
1
vote
1
answer
598
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Percent composition by volume of the reaction H2 + Br2 <=> 2HBr
For the reaction $\ce{H2(g) + Br2(g) <=> 2HBr(g)}$ at a certain temperature, $K=1$. Determine the composition (in per cent by volume) of the equilibrium reaction mixture if the initial mixture ...
- 123
0
votes
1
answer
67
views
Concentration and volumes
In the reaction:
$$\ce{H2SO4 +CaCO3 \to CO2 + H2O + CaSO4}$$
Does altering the concentration of the sulfuric acid change the volume of the carbon dioxide produced [the volume of the sulfuric acid is ...
- 1
2
votes
1
answer
585
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Equilibrium and Completeness of Reaction [duplicate]
In class we are currently learning about equilibrium and Le Chateliers principal. The principal makes sense but seems contrary to some other concepts. For example, using stoichiometry to calculate the ...
- 378
1
vote
2
answers
1k
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Can acid concentration be determined from Ka values in a titration? [duplicate]
Say I have a sample of vinegar and I want to find the concentration of ethanoic acid in it. So I perform a titration using a $\mathrm{pH}$ meter, and using that data I can draw a $\mathrm{pH}$ curve ...
- 419
6
votes
1
answer
3k
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Proof that Equilibrium Constant is a Ratio of Rate Constants
I have a question about this proof that shows the relationship between the rate constant and the equilibrium constant. In this proof, the assumption is that the reaction is $(a+b)$th order in the ...
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