calculate the concentration of freefe2 (aq) at equilibrium after 0.10 mol fe(no3)2 is added to 1.00 l of 3.00 mnacn(aq) at 25 °c given that the kf of fe(cn)64–is 1.5×1035.

Answers

Answer 1

The concentration of free Fe2+ at equilibrium is approximately 1.8 x 10^-17 M.

The formation of Fe(CN)64- can be represented by the equilibrium reaction:

Fe2+ + 4CN- ⇌ Fe(CN)64-

The equilibrium constant for this reaction can be expressed as Kf = [Fe(CN)64-]/([Fe2+][CN-]^4).

Initially, there is no Fe(CN)64- in solution, so [Fe(CN)64-] = 0 M. Let x be the concentration of free Fe2+ that reacts with CN- ions to form Fe(CN)64-. Then the equilibrium concentration of Fe(CN)64- will be [Fe(CN)64-] = x.

The concentration of CN- at equilibrium can be calculated using the stoichiometry of the reaction: 4 mol CN- are consumed for every 1 mol Fe2+. Thus, [CN-] = 4x.

Substituting these expressions into the equilibrium constant equation and solving for x, we get:

Kf = x/(3.00 - x)(4x)^4

Rearranging and solving the resulting quintic equation gives x ≈ 1.8 x 10^-17 M. This is the concentration of free Fe2+ at equilibrium.

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Related Questions

Describe 1 physical property and 1 chemical properties of a metal bicycle

Answers

Answer:

A physical property would be The metal, while a possible chemical property would be a chance of gallium. (Gallium is liquid on hot days)

Explanation:

Two atoms of Nh3 reacts with one N2 how many moles of Nh3 reacts with one 2.00 mole of N2​

Answers

Explanation:

there are four (4)mole of Nh3 that react with N2

Calculate the number of molecules in 64.5 grams of Nitrogen monoxide, NO

Answers

N=9.933

Explanation:

no of mole = m÷mr

then ,no of molecules=n×la

How many atoms are in 1.22 moles of magnesium?

Answers

Answer:

7.34684 × 10^23 atoms

Explanation:

Well, one mole is basically

6.022 × 10^23 atoms. So 1.22 moles would be

6.022 × 10^23 ⋅ 1.22 atoms.

6.022 × 10^23 ⋅ 1.22 = 7.34684 × 10^23 atoms

The total number of atoms in 1.22 moles of magnesium is 7.34 × 10²³.

One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions).The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant.

Given:

1.22 moles of magnesium

[tex]1 \text{ mole}= 6.022*10^{23}\text{ atoms}\\\\1.22 \text{ moles}= 1.22*6.022*10^{23}\text{ atoms}\\\\1.22 \text{ moles}=7.34*10^{23}\text{ atoms}[/tex]

So, the total number of atoms in 1.22 moles of magnesium is 7.34 × 10²³.

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brainly.com/question/11175128

Which additional claim can be BEST supported by the evidence from the skulls in the whale fossil record?

A.
The fossil record shows differences in the skulls of the mammals, which shows that they are from three separate species that all lived at the same time.

B.
The fossil record shows similarities in the skulls of the mammals, which shows that they must have had similar habitats and environments.

C.
The fossil record shows that some mammals evolved so that their nostrils are further at the top of their skull for better breathing while in the water.

D.
The fossil record does not give enough evidence about the mammals to determine if there is a relationship between the three skulls.

Answers

Answer:

d

Explanation:

Answer:

B

Explanation:

I think it is B because it starts out with it's nostrils so it is on the mouth causing it not to be able to breathe but over time it's nostril moved to the top of the head so they could breather better

Most of the mass of an atom is found in

Answers

Answer:

Most of the mass of an atom is found in the nucleus.

Explanation:

anyone know how to do this?

Answers

It’s kind of blurry

Hi please help with these questions :)

Answers

Answer:

c

Explanation:

because electricity has a good conduct tha is mental

what is a method to isolate insoluble salts after a neutralisation reaction

Answers

Answer:

multiply

Explanation:

multiplacation

How do you think the artist creates sculptures that vary in color and intensity?

Answers

Answer:

Light reflected off objects. Color has three main characteristics: hue (red, green, blue, etc.), value (how light or dark it is), and intensity (how bright or dull it is). Colors can be described as warm (red, yellow) or cool (blue, gray), depending on which end of the color spectrum they fall.

Christ Crowned / Honthorst

 

Christ Crowned with Thorns, Gerrit van Honthorst, about 1620

Value describes the brightness of color. Artists use color value to create different moods. Dark colors in a composition suggest a lack of light, as in a night or interior scene. Dark colors can often convey a sense of mystery or foreboding.

Light colors often describe a light source or light reflected within the composition. In this painting, the dark colors suggest a night or interior scene. The artist used light colors to describe the light created by the candle flame.

Annunciation / Bouts

 

The Annunciation, Dieric Bouts, 1450–1455

Intensity describes the purity or strength of a color. Bright colors are undiluted and are often associated with positive energy and heightened emotions. Dull colors have been diluted by mixing with other colors and create a sedate or serious mood. In this image the artist captured both the seriousness and the joy of the scene with the dull gray stone interior and the bright red drapery.

Explanation:

30)
Cosmologists believe that the universe is expanding and that it has been expanding since the Big Bang. Astronomers
viewing distant stars see evidence of this expansion in which phenomenon?
A)
Red shift
B)
Blue shift
Gamma pulse
D)
Background radiation

Answers

Answer:

i did this so the next person can have brainliest

Explanation:

describe the three states of matter that are present when snow melts

Answers

Answer:

solid liquid and gas

Explanation:

ice is a solid then it melts to liquid and evaporates into gas

Answer:

Snow is basically water;

ice/snow is solid state

water is liquid state

vapour is gaseous state

Explanation:

Table sugar and salt are examples of? A. mixtures B. elements C. atoms D. compounds

Answers

Answer:

The answer is compound because they consist of multiple things.

D, because the substance contains more than one element

84.9 g of solid iron reacts with oxygen gas forming iron(III) oxide. How many moles of oxygen will react

Answers

Answer:

1.14 moles of oxygen will react

Explanation:

The balanced equation of reaction between iron and oxygen is  

4 Fe + 3 O₂  → 2 Fe₂O₃

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

Fe: 4 molesO₂: 3 molesFe₂O₃: 2 moles

The molar mass of iron being Fe 55.85 g/mole, then the following amount of mass reacts by stoichiometry: 4 moles* 55.85 g/mole=223.4 g

You can apply the following rule of three: if by stoichiometry 223.4 grams of Fe react with 3 moles of O₂, 84.9 grams of Fe react with how many moles of O₂?

[tex]moles of O_{2} =\frac{84.9 grams of Fe*3 moles ofO_{2} }{223.4 grams of Fe}[/tex]

moles of O₂= 1.14 moles

1.14 moles of oxygen will react

What are the 3 Newton laws

Answers

Answer:

The laws are: (1) Every object moves in a straight line unless acted upon by a force.

(2) The acceleration of an object is directly proportional to the net force exerted and inversely proportional to the object's mass.

(3) For every action, there is an equal and opposite reaction.

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this image best explains the 3 laws ..

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2NaCl → 2Na +Cl2
What reaction is this

Answers

Answer:

Decomposition reaction

Explanation:

A single reactant breaking down to form 2 or more products is decomposition

How are the atomic number and the number of protons related to each other?

Answers

Answer:

Neutral atoms of each element contain an equal number of protons and electrons. The number of protons determines an element's atomic number and is used to distinguish one element from another. ... Together, the number of protons and the number of neutrons determine an element's mass number.

Explanation:

is there a better way to figure out the ratio of molecule types? What might that be?

Answers

no i don’t think so

An iron nail that has rusted is an example of a chemical reaction.
True
False

Answers

Answer:

True

Explanation:

How many orbitals are in the subshell with the following quantum numbers: n=4,l=2,ml=−2,−1,0,1,2?
Select the correct answer below:

A. 1

B. 3

C. 5

D. 7

Answers

The answer is the C.5

Identify the problem that the cold pack must address

Just need 1-3 sentences

Answers

Answer:

A person's hand holding a cold pack on an ankle ... To determine if a reaction is exothermic or endothermic, you have to compare the ... Well, that also applies to energy of solution problems.

Explanation:

Answer:

To determine if a reaction is exothermic or endothermic, you have to compare

Explanation:

Choose the aqueous solution below with the highest boiling point. These are all solutions of nonvolatile solutes and you should assume ideal van't Hoff factors where applicable.
A) 0.075 m NaI
B) 0.075 m (NH4)3PO4
C) 0.075 m NaBrO4
D) 0.075 m LiCN
E) 0.075 m KNO2

Answers

Answer:

B. (NH₄)₃PO₄

Explanation:

Elevation of boiling point is one of the colligative properties.

Formula is: ΔT = Kb . m . i

ΔT = Boiling T° of solution - Boiling T° of pure solvent.

i = Van't Hoff factor (numbers of ions dissolved)

Kb = Ebulloscopic constant

In this case, all the m are the same so let's dissociate the salts:

NaI → Na⁺  +  I⁻     i = 2

(NH₄)₃PO₄ → 3NH₄⁺  +  PO₄⁻³     i = 4

NaBrO₄  →  Na⁺  +  BrO₄⁻    i = 2

LiCN  →  Li⁺  +  CN⁻         i = 2

KNO2  →  K⁺  +  NO₂⁻        i = 2

The biggest i would have the biggest boiling point, then B is the right answer, ammonium phosphate.

You count the i, with the moles of ions, you dissociate from the salt.

In eukaryotic cells, RNA is transcribed from DNA in the _____

ribosomes

nuclear membrane

cytosol

nucleus

Answers

Answer:

The answer is Nucleolus

What molecular geometry would be expected for BF3 and NH3?

Answers

Answer:

Boron trifluoride would have a trigonal planar geometry.Ammonia would have a trigonal pyramidal geometry.

Explanation:

There are three valence electrons in a boron atom.

In boron trifluoride, the central boron atom did not achieve an octet with eight valence electrons. Rather, that boron atom would be electron deficient with only six valence electrons.

Each of the three fluoride atoms would have shared one valence electron with that boron atom, with a total of three boron-fluorine single bonds. On the other hand, all three of the valence electrons of that boron atom would be involved in bonding. Hence, there would be no extra valence electrons to act as lone pairs on that boron atom.

Hence, the central boron atom would have three electron domains (one for each boron-fluorine bond) with none of the electron domains coming from lone pairs. By the VSEPR theory, the geometry of the molecule would be trigonal planar. All four atoms in this molecule would be in the same plane.

There are five valence electrons in a nitrogen atom.

In ammonia, the central nitrogen atom is indeed able to achieve an octet (with eight valence electrons in total.) Three of the five valence electrons of nitrogen would form a total of three hydrogen-nitrogen bonds. The other two valence electrons would form a lone pair.

Hence the central nitrogen atom would have four electron domains (one for each of the three hydrogen-nitrogen bond, and one for the lone pair.) Hence, by the VSEPR theory, the geometry of this molecule would be trigonal pyramidal.


What is the motion of the particles in this kind of wave?
A.the particles will move up and down over large areas.
B.the particles will up and down over small areas.
C.the particles will move side to side over small areas.
D.the particles will move side to side over large areas.

Answers

Answer:

not sure sorry

Explanation:

Baking soda has a pH of 8. Its a(n) _________ substance
Acid
Neutral
Alkaline
Powdery
(god bless!! have a wonderful and blessed day!!! i love you!! and dont forget no matter what god loves you too!!!

Answers

Answer:

it's an acid

Explanation:

because itis soda

Determine the number of moles in a 100.0g sample of water.

Answers

Answer:

5.55 moles is the answer ....

Explanation:

if 18g H2O is equal to 1 mole then 100 g H2O is how much?

100/18 which is 5.55

Answer:

5.551

Explanation:

100.0g x 1mol H20/18.015g H20 = 5.551 moles of H20

The 18.015g is from the periodic table. H = 1.008x2 = 2.016g H2

0= 15.999

15.999 + 2.016= 18.015

In the equation for the orbital radii in hydrogen-like atoms, a0 is called the:
Select the correct answer below:

A. energy level

B. Bohr radius

C. nuclear charge

D. orbital constant

Answers

It’s B - Bohr radius
:)

Which of the following has a negative charge?

neutrons
electrons
nucleus
protons

Answers

Answer:

electrons have a negative charge

Explanation:

Answer:

Electrons

Explanation:

Determine whether each change represents oxidation or reduction. 1) CH3CHO to CH3CH2OH 2) CH3OH to CH4 3) N2H4to N2 4) gain of electrons 5) NO-2 to NH3 6) NAD+ to NADH 7) CH4 to Co2 8) Ag+ to Ag

Answers

Answer:

1) oxidation

2) Reduction

3) Oxidation

4) Reduction

5) Reduction

6) Reduction

7) Oxidation

8) Reduction

Explanation:

Oxidation is said to have taken place when there is a positive change in the oxidation number while reduction is said to have taken place when there is a decrease in the oxidation number.

The change from CH3CHO to CH3CH2OH represents on oxidation reaction.

The change from CH3OH to CH4 is a reduction because the oxidation number of carbon changes from +2 to -4.

The change from N2H4to N2 is an oxidation because the oxidation number of nitrogen increases from -2 to 0.

The gain in electrons is a reduction because the gain of electron leads to a decrease in oxidation number.

The change from NO- 2 to NH3 is a reduction because the oxidation number of nitrogen changes from +4 to -3.

The change from NAD+ to NADH is a reduction since NAD+ is the oxidized form of the enzyme while NADH is the reduced form of the enzyme.

The change from CH4 to Co2 is an oxidation because the oxidation number of carbon changes from -4 to + 4.

The change from Ag+ to Ag is a reduction because it involves the gain of one electron and a consequent decrease in oxidation number.

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Which one of the following par value 12% coupon bonds experiences a price change of $23 when the market yield changes by 50 basis points? ( please interpret) A) The bond with a duration of 6 years. 2 B) The bond with a duration of 5 years. C) The bond with a duration of 2.7 years. D) The bond with a duration of 5.15 years. E) None of the above. Under which assumption we have similar predictions to perfect competition model? a) Bertrand duopoly model with a limit capacity. b) A firm using first-degree price discrimination. c) Stackelberg duopoly model. d) A firm using third-degree price discrimination. which of these is a molecule? a. ca c. na b. mg d. h2o please select the best answer from the choices provided a b c d CHALLENGE ACTIVITY 9.1.3. Accessing a struct's data members. Write a statement to print the data members of InventoryTag. End with newline. Ex: if itemID is 314 and quantityRemaining is 500, print: Inventory ID: 314, Qty: 500 1 test passed All tests passed 1 #include 2 3 typedef struct InventoryTag_struct { 4 int itemID; 5 int quantityRemaining; } InventoryTag; 2 8 int main(void) { 9 InventoryTag redSweater; 10 11 scanf("%d", &redSweater.itemID); 12 scanf("%d", &red Sweater quantityRemaining); 13 \* Your solution goes here */ 15 16 return 0; 17 } Run Feedback? How was this section? 18.Suppose the boy first runs a distance of 100 metres in 50 seconds in going from his home to the shop in the East direction, and then runs a distance of 100 metres again. in 50 seconds in the reverse direction from the shop to reach back home from where he started (see Figure). (i) Find the speed of the boy. (ii) Find the Velocity of the boy (iii) A boy is sitting on a merry-go-round which is moving with a constant speed of 10m/s. This means that the boy is :(iv) In which of the following cases of motion, the distance moved and the magnitude of displacement are equal ?ANSWER IT ASAP!!! Damage to which system is causing Kai's pain and numbness? Katie and Anna are identical twins. Anna tends to be very optimistic. What does this tell you about Katie? She is likely to be optimistic. She is not likely to be optimistic. She is likely to be pessimistic. She is not likely to be pessimistic. the term ________ refers to an object's ability to take different forms. A bird sanctuary has 14 bags of bird seed. Each bird feeder holds 16 of a bag.How many bird feeders can be filled with the bird seed? In the diatomic molecule hci, the h and the ci share a pair of electrons. by doing so, the hydrogen atom attains the electron configuration of while chlorine attains the electron configuration of helium; neon neon; neon neon; argon helium; argon A basis for the slope of the short-run Phillips curve is that when unemployment is high there are O downward pressures on prices and wages. upward pressures on prices and wag O upward pressures on prices and downward pressures on wages. O downward pressures on prices and upward pressures on wages. The inverse of a conditional statement is "If a number is negative, then it has a negative cube root.What is the contrapositive of the original conditional statement?If a number is negative, then it does not have a negative cube root. If a number does not have a negative cube root, then the number is not negative. If a number has a negative cube root, then the number is negative. If a number is not negative, then it does not have a negative cube root. a sphere has a radius of 6 units. if the radius is tripled, by what factor does the volume increase? ----- has been brought the United States and consciously developed in conservatories and in the concert hall, while ----- is the music we sing and hear as an everyday part of society. which of the following has occurred in chinese life since the revolution? aphra behn is noted for her work as a(n) group of answer choices actor. director. playwright. designer. flag question: question 4 since the 19th century the power of the federal goverment had Sitting on the table is a red book and a blue book. Which one is hotter?A. Books are not blackbodies, so they do not emit radiation.B. The red bookC. They are probably the same temperatureD. The blue book A short story with the words decidedly,shudder,downcast Factor completely 3x2 5x 1. (3x 1)(x 1) (3x 5)(x 1) (3x 5)(x 1) Prime.