Backward Reaction Rate Constant given Keq and kf Calculator

✖Equilibrium Constant of a reaction is a state approached by a dynamic chemical system after sufficient time has elapsed at which its composition has no measurable tendency towards further change.ⓘ Equilibrium Constant [K_eqm]			+10% -10%
✖Forward Reaction Rate Constant for 2nd Order is used to define the relationship between the molar concentration of the reactants and the rate of the chemical reaction in forward direction.ⓘ Forward Reaction Rate Constant for 2nd Order [k_f']			+10% -10%

✖Backward Reaction Rate Constant given kf and Keq for 2nd Order is the proportionality constant relating the rate of the chemical reaction to the conc. of reactant or product in a backward reaction.ⓘ Backward Reaction Rate Constant given Keq and kf [k_bbr']

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Formula

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Backward Reaction Rate Constant given Keq and kf

Formula

`("k"_{"bbr"}"'") = "K"_{"eqm"}*("k"_{"f"}"'")`

Example

`"0.100734L/(mol*s)"="16.3"*"0.00618L/(mol*s)"`

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Backward Reaction Rate Constant given Keq and kf Solution

STEP 0: Pre-Calculation Summary

Formula Used

Backward Reaction Rate Constant given kf and Keq = Equilibrium Constant*Forward Reaction Rate Constant for 2nd Order
k_bbr' = K_eqm*k_f'
This formula uses 3 Variables

Variables Used

Backward Reaction Rate Constant given kf and Keq - (Measured in Cubic Meter per Mole Second) - Backward Reaction Rate Constant given kf and Keq for 2nd Order is the proportionality constant relating the rate of the chemical reaction to the conc. of reactant or product in a backward reaction.
Equilibrium Constant - Equilibrium Constant of a reaction is a state approached by a dynamic chemical system after sufficient time has elapsed at which its composition has no measurable tendency towards further change.
Forward Reaction Rate Constant for 2nd Order - (Measured in Cubic Meter per Mole Second) - Forward Reaction Rate Constant for 2nd Order is used to define the relationship between the molar concentration of the reactants and the rate of the chemical reaction in forward direction.

STEP 1: Convert Input(s) to Base Unit

Equilibrium Constant: 16.3 --> No Conversion Required
Forward Reaction Rate Constant for 2nd Order: 0.00618 Liter per Mole Second --> 6.18E-06 Cubic Meter per Mole Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

k_bbr' = K_eqm*k_f' --> 16.3*6.18E-06

Evaluating ... ...

k_bbr' = 0.000100734

STEP 3: Convert Result to Output's Unit

0.000100734 Cubic Meter per Mole Second -->0.100734 Liter per Mole Second (Check conversion here)

FINAL ANSWER

0.100734 Liter per Mole Second <-- Backward Reaction Rate Constant given kf and Keq

(Calculation completed in 00.004 seconds)

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< 7 Microscopic Reversibility Calculators

Concentration of Reactant A given kf and kb

Go Concentration of Reactant A at Equilibrium = Backward Reaction Rate Constant for 2nd Order/Forward Reaction Rate Constant for 2nd Order*((Concentration of Product C at Equilibrium*Concentration of Product D at Equilibrium)/Concentration of Reactant B at Equilibrium)

Concentration of Reactant B given kf and kb

Go Concentration of Reactant B at Equilibrium = Backward Reaction Rate Constant for 2nd Order/Forward Reaction Rate Constant for 2nd Order*((Concentration of Product C at Equilibrium*Concentration of Product D at Equilibrium)/Concentration of Reactant A at Equilibrium)

Concentration of Product C given kf and kb

Go Concentration of Product C at Equilibrium = Forward Reaction Rate Constant for 2nd Order/Backward Reaction Rate Constant for 2nd Order*((Concentration of Reactant A at Equilibrium*Concentration of Reactant B at Equilibrium)/Concentration of Product D at Equilibrium)

Concentration of Product D given kf and kb

Go Concentration of Product D at Equilibrium = Forward Reaction Rate Constant for 2nd Order/Backward Reaction Rate Constant for 2nd Order*((Concentration of Reactant A at Equilibrium*Concentration of Reactant B at Equilibrium)/Concentration of Product C at Equilibrium)

Forward Rate Constant given Keq and kb

Go Forward Reaction Rate Constant given kf and Keq = Equilibrium Constant for Second Order Reaction*Backward Reaction Rate Constant for 2nd Order

Backward Reaction Rate Constant given Keq and kf

Go Backward Reaction Rate Constant given kf and Keq = Equilibrium Constant*Forward Reaction Rate Constant for 2nd Order

Equilibrium Rate Constant given kf and kb

Go Equilibrium Constant = Forward Reaction Rate Constant for 2nd Order/Backward Reaction Rate Constant for 2nd Order

< 23 Important Formulas on Reversible Reaction Calculators

Time taken for 2nd Order Opposed by 2nd Order Reaction given Initial Conc of Reactant B

Go Time for 2nd Order = (1/Forward Reaction Rate Constant for 2nd Order)*(Concentration of Reactant at Equilibrium^2/(2*Initial Concentration of Reactant B*(Initial Concentration of Reactant B-Concentration of Reactant at Equilibrium)))*ln((Concentration of Product at Time t*(Initial Concentration of Reactant B-2*Concentration of Reactant at Equilibrium)+Initial Concentration of Reactant B*Concentration of Reactant at Equilibrium)/(Initial Concentration of Reactant B*(Concentration of Reactant at Equilibrium-Concentration of Product at Time t)))

Forward Rxn Rate Const for 2nd Order Opposed by 2nd Order Rxn given Ini Conc of Reactant A

Go Forward Reaction Rate Constant given A = (1/Time)*(Concentration of Reactant at Equilibrium^2/(2*Initial Concentration of Reactant A*(Initial Concentration of Reactant A-Concentration of Reactant at Equilibrium)))*ln((Concentration of Product at Time t*(Initial Concentration of Reactant A-2*Concentration of Reactant at Equilibrium)+Initial Concentration of Reactant A*Concentration of Reactant at Equilibrium)/(Initial Concentration of Reactant A*(Concentration of Reactant at Equilibrium-Concentration of Product at Time t)))

Time Taken for Completion of Reaction

Go Time = (1/Forward Reaction Rate Constant)*(Concentration of Reactant at Equilibrium/(2*Initial Concentration of Reactant A-Concentration of Reactant at Equilibrium))*ln((Initial Concentration of Reactant A*Concentration of Reactant at Equilibrium+Concentration of Product at Time t*(Initial Concentration of Reactant A-Concentration of Reactant at Equilibrium))/(Initial Concentration of Reactant A*(Concentration of Reactant at Equilibrium-Concentration of Product at Time t)))

Rate Constant for Forward Reaction

Go Forward Reaction Rate Constant = (1/Time)*(Concentration of Reactant at Equilibrium/(2*Initial Concentration of Reactant A-Concentration of Reactant at Equilibrium))*ln((Initial Concentration of Reactant A*Concentration of Reactant at Equilibrium+Concentration of Product at Time t*(Initial Concentration of Reactant A-Concentration of Reactant at Equilibrium))/(Initial Concentration of Reactant A*(Concentration of Reactant at Equilibrium-Concentration of Product at Time t)))

Time taken for 2nd Order Opposed by 1st Order Reaction given Initial Conc of Reactant A

Go Time = (1/Forward Reaction Rate Constant for 2nd Order)*(Concentration of Reactant at Equilibrium/((Initial Concentration of Reactant A^2)-(Concentration of Reactant at Equilibrium^2)))*ln((Concentration of Reactant at Equilibrium*(Initial Concentration of Reactant A^2-Concentration of Product at Time t*Concentration of Reactant at Equilibrium))/(Initial Concentration of Reactant A^2*(Concentration of Reactant at Equilibrium-Concentration of Product at Time t)))

Forward Rxn Rate Const for 2nd Order Opposed by 1st Order Rxn given Ini Conc of Reactant B

Go Forward Reaction Rate Constant given B = (1/Time)*(Concentration of Reactant at Equilibrium/(Initial Concentration of Reactant B^2-Concentration of Reactant at Equilibrium^2))*ln((Concentration of Reactant at Equilibrium*(Initial Concentration of Reactant B^2-Concentration of Product at Time t*Concentration of Reactant at Equilibrium))/(Initial Concentration of Reactant B^2*(Concentration of Reactant at Equilibrium-Concentration of Product at Time t)))

Reactant Concentration at given Time t

Go Concentration of A at Time t = Initial Concentration of Reactant A*(Forward Reaction Rate Constant/(Forward Reaction Rate Constant+Backward Reaction Rate Constant))*((Backward Reaction Rate Constant/Forward Reaction Rate Constant)+exp(-(Forward Reaction Rate Constant+Backward Reaction Rate Constant)*Time))

Time taken when Initial Concentration of Reactant B greater than 0

Go Time = 1/Forward Reaction Rate Constant*ln(Concentration of Reactant at Equilibrium/(Concentration of Reactant at Equilibrium-Concentration of Product at Time t))*((Initial Concentration of Reactant B+Concentration of Reactant at Equilibrium)/(Initial Concentration of Reactant A+Initial Concentration of Reactant B))

Product Conc for 1st Order Opposed by 1st Order Rxn given Initial Conc of B greater than 0

Go Concentration of Product at Time t = Concentration of Reactant at Equilibrium*(1-exp(-Forward Reaction Rate Constant*((Initial Concentration of Reactant A+Initial Concentration of Reactant B)/(Initial Concentration of Reactant B+Concentration of Reactant at Equilibrium))*Time))

Backward Reaction Rate Constant for 2nd Order Opposed by 2nd Order Reaction

Go Backward Reaction Rate Constant for 2nd Order = Forward Reaction Rate Constant for 2nd Order*((Initial Concentration of Reactant A-Concentration of Reactant at Equilibrium)*(Initial Concentration of Reactant B-Concentration of Reactant at Equilibrium))/Concentration of Reactant at Equilibrium^2

Backward Reaction Rate Constant for 2nd Order Opposed by 1st Order Reaction

Go Rate Constant for Backward Reaction = Forward Reaction Rate Constant for 2nd Order*((Initial Concentration of Reactant A-Concentration of Reactant at Equilibrium)*(Initial Concentration of Reactant B-Concentration of Reactant at Equilibrium))/Concentration of Reactant at Equilibrium

Time taken for 1st Order Opposed by 1st Order Reaction given Initial Concentration of Reactant

Go Time = (1/Forward Reaction Rate Constant)*(Concentration of Reactant at Equilibrium/Initial Concentration of Reactant A)*ln(Concentration of Reactant at Equilibrium/(Concentration of Reactant at Equilibrium-Concentration of Product at Time t))

Concentration of Reactant A given kf and kb

Concentration of Reactant B given kf and kb

Concentration of Product C given kf and kb

Concentration of Product D given kf and kb

Product Conc of First Order Opposed by First Order Reaction given Initial Conc of Reactant

Go Concentration of Product at Time t = Concentration of Reactant at Equilibrium*(1-exp(-Forward Reaction Rate Constant*Time*(Initial Concentration of Reactant A/Concentration of Reactant at Equilibrium)))

Time taken for 1st Order Opposed by 1st Order Reaction

Go Time = ln(Concentration of Reactant at Equilibrium/(Concentration of Reactant at Equilibrium-Concentration of Product at Time t))/(Forward Reaction Rate Constant+Backward Reaction Rate Constant)

Rate Constant for Backward Reaction

Go Rate Constant of Backward Reaction = Forward Reaction Rate Constant*(Initial Concentration of Reactant A-Concentration of Reactant at Equilibrium)/Concentration of Reactant at Equilibrium^2

Product Concentration of 1st Order Opposed by 1st Order Reaction at given Time t

Go Concentration of Product at Time t = Concentration of Reactant at Equilibrium*(1-exp(-(Forward Reaction Rate Constant+Backward Reaction Rate Constant)*Time))

Forward Rate Constant given Keq and kb

Go Forward Reaction Rate Constant given kf and Keq = Equilibrium Constant for Second Order Reaction*Backward Reaction Rate Constant for 2nd Order

Backward Reaction Rate Constant given Keq and kf

Go Backward Reaction Rate Constant given kf and Keq = Equilibrium Constant*Forward Reaction Rate Constant for 2nd Order

Equilibrium Rate Constant given kf and kb

Go Equilibrium Constant = Forward Reaction Rate Constant for 2nd Order/Backward Reaction Rate Constant for 2nd Order

Backward Reaction Rate Constant given Keq and kf Formula

Backward Reaction Rate Constant given kf and Keq = Equilibrium Constant*Forward Reaction Rate Constant for 2nd Order
k_bbr' = K_eqm*k_f'

What is an Opposing Reaction?

Opposing reactions or reversible reactions are those in which both forward and backward reaction takes place simultaneously. To start with, the rate of forward reaction is very large and it decreases as reactant concentration decreases with time. Similarly, initially the rate of backward reaction is slow and it increases as product concentration increases with time. The state at which the rate of forward reaction equals the rate of backward reaction is called the equilibrium state. Thus, equilibrium is a dynamic equilibrium where all the participants of a reaction are being formed as fast as they are being destroyed and hence no further change in the various concentrations is observed.

What are the classifications of Opposing Reactions?

A reversible reaction may be classified on the basis of orders of elementary forward and backward reactions. We describe below a few reversible reactions classified accordingly:
1. First Order Opposed by First Order Reaction
2. First Order Opposed by Second Order Reaction
3. Second Order Opposed by First Order Reaction
4. Second Order Opposed by Second Order Reaction.

How to Calculate Backward Reaction Rate Constant given Keq and kf?

Backward Reaction Rate Constant given Keq and kf calculator uses Backward Reaction Rate Constant given kf and Keq = Equilibrium Constant*Forward Reaction Rate Constant for 2nd Order to calculate the Backward Reaction Rate Constant given kf and Keq, The Backward Reaction Rate Constant given Keq and kf formula is defined as rate constant of a microscopic reaction moving in the backward direction, i.e., towards the reactant. Backward Reaction Rate Constant given kf and Keq is denoted by k_bbr' symbol.

How to calculate Backward Reaction Rate Constant given Keq and kf using this online calculator? To use this online calculator for Backward Reaction Rate Constant given Keq and kf, enter Equilibrium Constant (K_eqm) & Forward Reaction Rate Constant for 2nd Order (k_f') and hit the calculate button. Here is how the Backward Reaction Rate Constant given Keq and kf calculation can be explained with given input values -> 100.734 = 16.3*6.18E-06.

FAQ

What is Backward Reaction Rate Constant given Keq and kf?

The Backward Reaction Rate Constant given Keq and kf formula is defined as rate constant of a microscopic reaction moving in the backward direction, i.e., towards the reactant and is represented as k_bbr' = K_eqm*k_f' or Backward Reaction Rate Constant given kf and Keq = Equilibrium Constant*Forward Reaction Rate Constant for 2nd Order. Equilibrium Constant of a reaction is a state approached by a dynamic chemical system after sufficient time has elapsed at which its composition has no measurable tendency towards further change & Forward Reaction Rate Constant for 2nd Order is used to define the relationship between the molar concentration of the reactants and the rate of the chemical reaction in forward direction.

How to calculate Backward Reaction Rate Constant given Keq and kf?

The Backward Reaction Rate Constant given Keq and kf formula is defined as rate constant of a microscopic reaction moving in the backward direction, i.e., towards the reactant is calculated using Backward Reaction Rate Constant given kf and Keq = Equilibrium Constant*Forward Reaction Rate Constant for 2nd Order. To calculate Backward Reaction Rate Constant given Keq and kf, you need Equilibrium Constant (K_eqm) & Forward Reaction Rate Constant for 2nd Order (k_f'). With our tool, you need to enter the respective value for Equilibrium Constant & Forward Reaction Rate Constant for 2nd Order and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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