1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lemur [1.5K]
2 years ago
11

The initial concentrations of I2 and I− in the reaction below are each 0.0401 M. If the initial concentration of I−3 is 0.0 M an

d the equilibrium constant is Kc=0.25 under certain conditions, what is the equilibrium concentration (in molarity) of I−? I−3(aq)↽−−⇀I2(aq)+I−(aq)
Chemistry
1 answer:
lutik1710 [3]2 years ago
0 0

Answer:

[I⁻] = 0.0352M

Explanation:

Based on the equilibrium:

I₃⁻(aq) ⇄ I₂(aq) + I⁻(aq)

Kc is defined as:

Kc = 0.25 = [I₂] [I⁻] / [I₃⁻]

<em>The system reaches the equilbrium when the ratio</em> [I₂] [I⁻] / [I₃⁻] <em>is equal to 0.25</em>

In the beginning, you add 0.0401M of both [I₂] [I⁻].  When the reaction reach the equilibrium, xM of both [I₂] [I⁻] is consumed producing xM of  [I₃⁻]. That is written as:

[I₃⁻] = X

[I₂] = 0.0401M - X

[I⁻] = 0.0401M - X

<em>X is known as reaction coordinate.</em>

<em />

Replacing in Kc:

0.25 = [I₂] [I⁻] / [I₃⁻]

0.25 = [0.0401M - X] [0.0401M - X] / [X]

0.25X = 0.00160801 - 0.0802X + X²

0 = 0.00160801 - 0.3302X + X²

Solving for X:

X = 0.0049M → Right solution

X = 0.3252M → False solution. Produce negative concentrations

Replacing, equilibrium concentrations will be:

[I₃⁻] = X

[I₂] = 0.0401M - X

[I⁻] = 0.0401M - X

[I₃⁻] = 0.0049M

[I₂] = 0.0352M

<h3>[I⁻] = 0.0352M</h3>

You might be interested in
Explain why a coin is able to float on top of water in a glass.
AlexFokin [52]
It is the concept of surface tension that helps the coin to float on the top of the water in the glass. The surface tension acts just opposite to the gravitational force and that is why when any metal placed in the water it will float and come on the surface. Hope this helps!
8 0
3 years ago
Read 2 more answers
Pure sodium metal explodes when it makes contact with water, and chlorine, in its natural state, is a deadly, poisonous gas. Whe
arlik [135]
The answer is A because the information is stating that when one chemical combined with another chemical, it had new properties which is essentially answer choice A
7 0
2 years ago
Read 2 more answers
A medical drug with a chemical formula of c4 (HNO3)6 is used to treat mild to moderate pain and to reduce fever . how many atoms
DerKrebs [107]

Answer:

38

Explanation:

5 0
3 years ago
What change would shift the equilibrium system to the left?
SVEN [57.7K]

Answer:

Adding more of gas C to the system

Explanation:

  • <em>Le Châtelier's principle</em><em> states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.</em>

1) Adding more of gas C to the system:

Adding more C gas will increase the concentration of the products side. So, the reaction will be shifted to the left to attain the equilibrium again.

2) Heating the system:

Heating the system will increase the concentration of the reactants side as the reaction is endothermic. so, the reaction will be shifted to the right to attain the equilibrium again.

3) Increasing the volume:

has no effect since the no. of moles of gases is the same in both reactants and products sides.

4) Removing some of gas C from the system:

Removing some of gas C from the system will decrease the concentration of the products side. So, the reaction will be shifted to the right to attain the equilibrium again.

<em>So, the right choice is: Adding more of gas C to the system.</em>

<em></em>

3 0
3 years ago
Read 2 more answers
Is dissolving a solid a physical or chemical change
Mrac [35]

Dissolving a solid in liquid is a physical change . For eg table salt in water is a physical change because only the state of the matter has changed. Allowing the water to evaporate will return the salt to a solid state. Thus, dissolving a solid is a physical change.

7 0
3 years ago
Other questions:
  • Which of these is an example of a chemical change?
    15·2 answers
  • The molecular mass of a substance refers to the:
    5·1 answer
  • In a fuel cell there is direct conversion of mechanical energy into electricity.
    6·1 answer
  • If a balloon is filled with 20 cc of air at 25 c what will its volume be at 0
    14·1 answer
  • 45 POINT HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Which of the following is correct in order of lowest
    5·1 answer
  • What is meant by Critical temperatue?
    10·1 answer
  • A __________ is a closed path or loop around which an electric current flows.
    11·2 answers
  • What is an an example of a chemical reaction?
    9·2 answers
  • Which statement is true?
    5·1 answer
  • Is this atom more likely to gain electrons or to lose electrons? Explain how you can tell
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!