assume in a different experiment, you prepare a mixture containing 10.0 M FeSCN2+, 1.0 M H+, 0.1 MFe3+ and 0.1 M HSCN. Is the initial mixture at equilibrium? If not, in what direction must the reactionproceed to reach equilibrium? (Hint: You will need to use the value of Kc you determined in the lab
Answers
Answer:
The mixture is not in equilibrium, the reaction will shift to the left.
Explanation:
Based on the equilibrium:
Fe³⁺+ HSCN ⇄ FeSCN²⁺ + H⁺
kc = 30 = [FeSCN²⁺] [H⁺] / [Fe³⁺] [HSCN]
Where [] are concentrations at equilibrium. The reaction is in equilibrium when the ratio of concentrations = kc
Q is the same expression than kc but with [] that are not in equilibrium
Replacing:
Q = [10.0M] [1.0M] / [0.1M] [0.1M]
Q = 1000
As Q > kc, the reaction will shift to the left in order to produce Fe³⁺ and HSCN untill Q = Kc
Final answer:
The mixture's equilibrium status can be determined by comparing the reaction quotient (Q) with the equilibrium constant (Kc). If Q < Kc, the reaction proceeds to the right (products) to achieve equilibrium. If Q > Kc, the reaction proceeds to the left (reactants) to achieve equilibrium.
Explanation:
To determine if the mixture is initially at equilibrium, we need to calculate and compare the reaction quotient (Q) and the equilibrium constant (Kc) of the reaction. The reaction quotient is a measure of the relative concentrations of products and reactants at any point in time, whereas Kc, is the measure of these concentrations only at equilibrium.
Assuming that the reaction in question is: Fe3+ + HSCN ↔ FeSCN2+ + H + . In this case,
Q = [FeSCN2+]/[Fe3+][HSCN] = 10 / (0.1 * 0.1) = 1000. If Kc is less than 1000, the reaction is not at equilibrium and will need to proceed to the left (reactants) to reach equilibrium. Conversely, if Kc is greater than 1000, the reaction is not at equilibrium and will need to proceed to the right (products).
Learn more about Chemical Equilibrium here:
#SPJ11
Related Questions
Challenge question! One of the things hedoesn't mention is in order to use E=hf,and any derivation of it, the energy mustbe in JOULES. We have the energy in eV.So this will be a two step question. First,convert the energy to joules (or use thenumber from our equation sheet) thenfind the wavelength. Once you are donewith that, pick the correct answer below.8.29x10^-16 m3.75x10^26 m2.48x10^-7 m3.98x10^-26 m
What is the molarity of a solution that contains 30 grams of naoh in 500 milliliters of solution?
What is the density of iron if it crystallizes in a body-centered cubic unit cell with an edge length of 287 pm
Which expression correctly describes energy using SI units? A. 1 J=1kg•m^2/s^2 B. 1 J= 1kg•m/s^2 C. 1 J= 1kg• m/s D. 1 J= 1kg•m^2/s
Answers
Answer: The molal boiling point elevation constant of X is
Explanation:
Formula used for Elevation in boiling point :
or,
where,
= boiling point constant = ?
m = molality
= mass of solute (urea) = 55.4 g
= mass of solvent X = 500 g
= molar mass of solute (urea) = 60 g/mol
Now put all the given values in the above formula, we get:
Thus the molal boiling point elevation constant of X is
Answers
Here's the answer, I remember doing this problem last year.
23.5 degrees north, 77 degrees west
Answers
Final answer:
A chemical change or reaction between elements or compounds may occur when there is enough energy present. This can be in the form of heat, light, or electricity. An example of this is the reaction between hydrogen and oxygen to form water, which requires a spark.
Explanation:
If two or more elements or chemical compounds come into contact with one another and there is enough energy present, a chemical change may take place. This is because a chemical reaction, which represents a chemical change, requires energy to break the bonds of the reactants and form new bonds in the products. This energy can be in various forms such as heat, light, or electricity.
For example, the reaction between hydrogen and oxygen to form water is a chemical change that requires energy in the form of a spark. On the other hand, an exothermic reaction, such as the combustion of gasoline, releases energy in the form of heat and light.
Learn more about Chemical Change here:
#SPJ3
Answer:
energy
Explanation:
"If two or more elements or chemical compounds come into contact with one another and there is enough energy present, a chemical change may take place." this was on a science lesson, it's correct.
B. Quantitive observation
C. Evaluation
D. Qualitative observation
Answers
Answer:
B (Quantitative)
Explanation:
a clever way to remember the difference between quantitative and qualitative is that there is a nin quantitative which is the first letter to the word number.So quantitative is an oberservation with numbers
How many bonding electrons are present in this compound?
How many lone pair (non-bonding) electrons are present in this compound?
Answers
Answer:
Valence electrons in XeCl2 = 8 + 7 + 7 = 22.
Bonding electrons = 4.
Nonbonding electrons = 18.
Explanation:
Hello.
In this case, you can see the Lewis structure on the attached picture, in which you can see that there are since xenon has 8 valance electrons and each chlorine has 7 valence electrons, the total amount of valence electrons is:
Valence electrons in XeCl2 = 8 + 7 + 7 = 22.
Moreover, since each chlorine atom is bonding with one of the eight electrons of xenon (Lewis structure), we can see there are 4 bonding electrons.
Finally, since there are six nonbonding electrons per chlorine atom and six nonbonding electrons in xenon, the overall nonbonding electrons are:
Nonbonding electrons in XeCl2 = 6 + 6 + 6 = 18.
Regards.
Answers
- 4.289
Explanation:
4.289 x 10^0 can be written as a regular number by moving the decimal point to the right or left based on the exponent value. Since the exponent is 0, the decimal point does not need to be moved. Therefore, the regular number form of 4.289 x 10^0 is simply 4.289.