FormulaDen.com

Physics Chemistry Math Chemical Engineering Civil Electrical Electronics Electronics and Instrumentation Materials Science Mechanical Production Engineering Financial Health

Rate Constant for Forward Reaction Formula

Fx Copy

LaTeX Copy

Forward Reaction Rate Constant is used to define the relationship between the molar concentration of the reactants and the rate of the chemical reaction in forward direction. Check FAQs

k f = (\frac{1}{t}) \cdot (\frac{x eq}{2 \cdot A 0 - x eq}) \cdot \ln (\frac{A 0 \cdot x eq + x \cdot (A 0 - x eq)}{A 0 \cdot (x eq - x)})

k_f - Forward Reaction Rate Constant?t - Time?x_eq - Concentration of Reactant at Equilibrium?A₀ - Initial Concentration of Reactant A?x - Concentration of Product at Time t?

Rate Constant for Forward Reaction Example

With values

With units

Only example

Here is how the Rate Constant for Forward Reaction equation looks like with Values.

Here is how the Rate Constant for Forward Reaction equation looks like with Units.

Here is how the Rate Constant for Forward Reaction equation looks like.

9.1E-5 = (\frac{1}{3600}) \cdot (\frac{70}{2 \cdot 100 - 70}) \cdot \ln (\frac{100 \cdot 70 + 27.5 \cdot (100 - 70)}{100 \cdot (70 - 27.5)})

9.1E-5s⁻¹ = (\frac{1}{3600s}) \cdot (\frac{70mol/L}{2 \cdot 100mol/L - 70mol/L}) \cdot \ln (\frac{100mol/L \cdot 70mol/L + 27.5mol/L \cdot (100mol/L - 70mol/L)}{100mol/L \cdot (70mol/L - 27.5mol/L)})

9.1E-5 = (\frac{1}{3600}) \cdot (\frac{70}{2 \cdot 100 - 70}) \cdot \ln (\frac{100 \cdot 70 + 27.5 \cdot (100 - 70)}{100 \cdot (70 - 27.5)})

Tip: Use pencil ( Pencil

) icon above to edit Input Values and Units.

Calculate

Recalculate

Solution

Copy

Reset

You are here -

Home » Category

Chemistry » Category

Chemical Kinetics » Category

Complex Reactions » fx Rate Constant for Forward Reaction

Rate Constant for Forward Reaction Solution

Follow our step by step solution on how to calculate Rate Constant for Forward Reaction?

FIRST Step Consider the formula

k f = (\frac{1}{t}) \cdot (\frac{x eq}{2 \cdot A 0 - x eq}) \cdot \ln (\frac{A 0 \cdot x eq + x \cdot (A 0 - x eq)}{A 0 \cdot (x eq - x)})

Next Step Substitute values of Variables

∴

k f = (\frac{1}{3600s}) \cdot (\frac{70mol/L}{2 \cdot 100mol/L - 70mol/L}) \cdot \ln (\frac{100mol/L \cdot 70mol/L + 27.5mol/L \cdot (100mol/L - 70mol/L)}{100mol/L \cdot (70mol/L - 27.5mol/L)})

Next Step Convert Units

∴

k f = (\frac{1}{3600s}) \cdot (\frac{70000mol/m³}{2 \cdot 100000mol/m³ - 70000mol/m³}) \cdot \ln (\frac{100000mol/m³ \cdot 70000mol/m³ + 27500mol/m³ \cdot (100000mol/m³ - 70000mol/m³)}{100000mol/m³ \cdot (70000mol/m³ - 27500mol/m³)})

Next Step Prepare to Evaluate

∴

k f = (\frac{1}{3600}) \cdot (\frac{70000}{2 \cdot 100000 - 70000}) \cdot \ln (\frac{100000 \cdot 70000 + 27500 \cdot (100000 - 70000)}{100000 \cdot (70000 - 27500)})

Next Step Evaluate

∴

k f = 9.12998562912231E-05s⁻¹

LAST Step Rounding Answer

∴

k f = 9.1E-5s⁻¹

Rate Constant for Forward Reaction Formula Elements

Variables

Functions

Forward Reaction Rate Constant

Forward Reaction Rate Constant is used to define the relationship between the molar concentration of the reactants and the rate of the chemical reaction in forward direction.

Symbol: k_f

Measurement: First Order Reaction Rate ConstantUnit: s⁻¹

Note: Value should be greater than 0.

Formulas to find Forward Reaction Rate Constant

Time

Time is used to defined as the period of time that is required for the reactant to given a certain amount of product in a chemical reaction.

Symbol: t

Measurement: TimeUnit: s

Note: Value should be greater than -1.

Formulas to find Time

Concentration of Reactant at Equilibrium

Concentration of Reactant at Equilibrium is defined as the amount of reactant present when the reaction is at equilibrium condition.

Symbol: x_eq

Measurement: Molar ConcentrationUnit: mol/L

Note: Value should be greater than 0.

Formulas to find Concentration of Reactant at Equilibrium

Initial Concentration of Reactant A

Initial Concentration of Reactant A is defined as the concentration of the reactant A at time t=0.

Symbol: A₀

Measurement: Molar ConcentrationUnit: mol/L

Note: Value should be greater than 0.

Formulas to find Initial Concentration of Reactant A

Concentration of Product at Time t

Concentration of Product at Time t is defined as the amount of reactant that has been converted into product in a time interval of t.

Symbol: x

Measurement: Molar ConcentrationUnit: mol/L

Note: Value should be greater than 0.

Formulas to find Concentration of Product at Time t

The natural logarithm, also known as the logarithm to the base e, is the inverse function of the natural exponential function.

Syntax: ln(Number)

Other formulas in First Order Opposed by Second Order Reactions category

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

x = x eq \cdot (1 - \exp (- k f \cdot (\frac{A 0 + B 0}{B 0 + x eq}) \cdot t))

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

x = x eq \cdot (1 - \exp (- k f \cdot t \cdot (\frac{A 0}{x eq})))

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

x = x eq \cdot (1 - \exp (- (k f + k b) \cdot t))

Go Reactant Concentration at given Time t

A = A 0 \cdot (\frac{k f}{k f + k b}) \cdot ((\frac{k b}{k f}) + \exp (- (k f + k b) \cdot t))

How to Evaluate Rate Constant for Forward Reaction?

Rate Constant for Forward Reaction evaluator uses 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))) to evaluate the Forward Reaction Rate Constant, The Rate Constant for Forward Reaction formula is defined as the relationship between the molar concentration of the reactants and the rate of the chemical reaction taking place in the forward direction. Forward Reaction Rate Constant is denoted by k_f symbol.

How to evaluate Rate Constant for Forward Reaction using this online evaluator? To use this online evaluator for Rate Constant for Forward Reaction, enter Time (t), Concentration of Reactant at Equilibrium (x_eq), Initial Concentration of Reactant A (A₀) & Concentration of Product at Time t (x) and hit the calculate button.

FAQs on Rate Constant for Forward Reaction

What is the formula to find Rate Constant for Forward Reaction?

The formula of Rate Constant for Forward Reaction is expressed as 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))). Here is an example- 6.3E-5 = (1/3600)*(70000/(2*100000-70000))*ln((100000*70000+27500*(100000-70000))/(100000*(70000-27500))).

How to calculate Rate Constant for Forward Reaction?

With Time (t), Concentration of Reactant at Equilibrium (x_eq), Initial Concentration of Reactant A (A₀) & Concentration of Product at Time t (x) we can find Rate Constant for Forward Reaction using the formula - 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))). This formula also uses Natural Logarithm (ln) function(s).

Can the Rate Constant for Forward Reaction be negative?

Yes, the Rate Constant for Forward Reaction, measured in First Order Reaction Rate Constant can be negative.

Which unit is used to measure Rate Constant for Forward Reaction?

Rate Constant for Forward Reaction is usually measured using the 1 Per Second[s⁻¹] for First Order Reaction Rate Constant. 1 Per Millisecond[s⁻¹], 1 Per Day[s⁻¹], 1 Per Hour[s⁻¹] are the few other units in which Rate Constant for Forward Reaction can be measured.

Let Others Know

✖

Facebook

Twitter

Copied!

: Value
: Unit

Rate Constant for Forward Reaction Formula

Rate Constant for Forward Reaction Example

Rate Constant for Forward Reaction Solution

Rate Constant for Forward Reaction Formula Elements

Other formulas in First Order Opposed by Second Order Reactions category

How to Evaluate Rate Constant for Forward Reaction?

FAQs on Rate Constant for Forward Reaction

Variable Name