Chemistry, 15.11.2019 04:31 hannahgracew12

Consider the equilibrium reaction below. at high concentrations of ha the solution will be yellow; but at low concentrations of ha the solution will be red. initially the equilibrium mixture below is orange (combination of yellow & red). what color is expected after adding some colorless a–(aq) to the equilibrium solution? a-(aq) + h2o(ℓ) ⇋ ha(aq) + oh-(aq)

Answers: 3

Show answers

Answers

Answer from: flixtier

The correct answer is: Yellow

Explanation:

The given reaction at equilibrium: A⁻(aq) + H₂O(ℓ) ⇋ HA(aq) + OH⁻(aq)

Given: Solution color at high product (HA) concentration = yellow

Solution color at low product (HA) concentration = red

Initial color of solution = orange

According to the Le Châtelier's principle, addition of reactant to the reaction at equilibrium, shifts the equilibrium towards the right side of the reaction or towards the forward direction. Therefore, favoring the product formation.

So, if the reactant A⁻(aq) is added to the reaction mixture, more product (HA) is produced. Therefore, the concentration of the product HA increases.

Since the solution is yellow in color at high product (HA) concentration.

Therefore, when the concentration of the product HA increases upon the addition of reactant A⁻(aq), the color of the solution changes from orange to yellow.

Answer from: Arealbot

Explanation:

Methyl orange is the indicator which shows color transitions from red to orange and from orange to yellow.

This change in color of methyl orange is due to the change occurring in the pH of the solution.

When the solution is acidic (pH less than 7) in nature then on addition of methyl orange the color of solution will become red. When solution is neutral (pH = 7) then addition of methyl orange will change the color of solution into orange.When solution is basic (pH more than 7) in nature then addition of methyl orange will change the color of solution into yellow.

Also, according to Le Chatelier's principle any disturbance caused in an equilibrium reaction will tend to shift the equilibrium in a direction away from the disturbance.

So, when $A^{-}$ is added into the solution then it means that we are increasing the amount of reactant.

Therefore, the equilibrium will shift in the forward direction that is, formation of products is favored. As product side contains HA so, this shift in equilibrium will change the color of solution into yellow.

Thus, we can conclude that yellow color is expected after adding some colorless $A^{-}(aq)$ to the equilibrium solution.

Answer from: Quest

the answer would be a

Answer from: Quest

the dissociation of nickel hydroxide is follows:

$ni(oh)_2 > ni^2^+ + 2 oh^-$

$ksp for no(oh)2 = 5.5 * 10^-^1^6$

$5.5 * 10^-^1^6 = s * (2 s)^2 = 4 s^3$

$s^3 = 137.5 * 10^-^1^8$

$s = 5.14 * 10^-^6 = [oh^-]$

the concentration of hydroxide ion is

$5.14 * 10^-^6 = [oh^-]$

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

$k = [ ni^2^+] * [oh^-]^2$

$6.1 * 10^-^1^6 = [ ni^2] * [5.14 * 10^-^6]^2$

$[ ni^2^+] = 0.23 * 10^-^4 mol /l$

thus, concentration of ni is 0.23 * 10^-^4 mol /l

Another question on Chemistry

Chemistry, 22.06.2019 06:10

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.

Answers: 1

Answer

Chemistry, 22.06.2019 11:10

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear

Answers: 1

Answer

Chemistry, 22.06.2019 14:00

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

Answers: 3

Answer

Chemistry, 22.06.2019 22:30

How many valence electrons are in atom of radon?

Answers: 1

Answer

You know the right answer?

Consider the equilibrium reaction below. at high concentrations of ha the solution will be yellow;...

Questions