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The Rate Constant for First Order Reaction is defined as the rate of the reaction divided by the concentration of the reactant. Check FAQs
kfirst=2.303tcompletionlog10(A0Ct)
kfirst - Rate Constant for First Order Reaction?tcompletion - Time for completion?A0 - Initial Concentration for First Order Reaction?Ct - Concentration at Time t?

Rate Constant of First Order Reaction using Logarithm to base 10 Example

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With units
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Here is how the Rate Constant of First Order Reaction using Logarithm to base 10 equation looks like with Values.

Here is how the Rate Constant of First Order Reaction using Logarithm to base 10 equation looks like with Units.

Here is how the Rate Constant of First Order Reaction using Logarithm to base 10 equation looks like.

0.5206Edit=2.3034.3Editlog10(7.5Edit0.8Edit)
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Rate Constant of First Order Reaction using Logarithm to base 10 Solution

Follow our step by step solution on how to calculate Rate Constant of First Order Reaction using Logarithm to base 10?

FIRST Step Consider the formula
kfirst=2.303tcompletionlog10(A0Ct)
Next Step Substitute values of Variables
kfirst=2.3034.3slog10(7.5mol/L0.8mol/L)
Next Step Convert Units
kfirst=2.3034.3slog10(7500mol/m³800mol/m³)
Next Step Prepare to Evaluate
kfirst=2.3034.3log10(7500800)
Next Step Evaluate
kfirst=0.520569732453172s⁻¹
LAST Step Rounding Answer
kfirst=0.5206s⁻¹

Rate Constant of First Order Reaction using Logarithm to base 10 Formula Elements

Variables
Functions
Rate Constant for First Order Reaction
The Rate Constant for First Order Reaction is defined as the rate of the reaction divided by the concentration of the reactant.
Symbol: kfirst
Measurement: First Order Reaction Rate ConstantUnit: s⁻¹
Note: Value can be positive or negative.
Time for completion
The Time for completion is defined as the time required for a complete transformation of reactant into the product.
Symbol: tcompletion
Measurement: TimeUnit: s
Note: Value can be positive or negative.
Initial Concentration for First Order Reaction
The Initial Concentration for First Order Reaction is the amount of reactant present before the start of the reaction.
Symbol: A0
Measurement: Molar ConcentrationUnit: mol/L
Note: Value can be positive or negative.
Concentration at Time t
The Concentration at Time t is the amount of species formed or reacted in that particular time.
Symbol: Ct
Measurement: Molar ConcentrationUnit: mol/L
Note: Value can be positive or negative.
log10
The common logarithm, also known as the base-10 logarithm or the decimal logarithm, is a mathematical function that is the inverse of the exponential function.
Syntax: log10(Number)

Other Formulas to find Rate Constant for First Order Reaction

​Go Rate Constant at Half Time for First Order Reaction
kfirst=0.693t1/2
​Go Rate Constant by Titration Method for First Order Reaction
kfirst=(2.303tcompletion)log10(V0Vt)
​Go Rate constant given average time
kfirst=1tavg
​Go Rate Constant for First Order Reaction from Arrhenius Equation
kfirst=Afactor-firstorderexp(-Ea1[R]TFirstOrder)

Other formulas in First Order Reaction category

​Go Time for Completion of First Order Reaction
tcompletion=2.303kfirstlog10(CAOax)
​Go Time for Completion for First Order given Rate Constant and Initial Concentration
tcompletion=2.303kfirstlog10(A0Ct)
​Go Half Time Completion of First Order Reaction
t1/2=0.693kfirst
​Go Average Time of Completion for First Order Reaction
tavg=1kfirst

How to Evaluate Rate Constant of First Order Reaction using Logarithm to base 10?

Rate Constant of First Order Reaction using Logarithm to base 10 evaluator uses Rate Constant for First Order Reaction = 2.303/Time for completion*log10(Initial Concentration for First Order Reaction/Concentration at Time t) to evaluate the Rate Constant for First Order Reaction, The Rate Constant of First Order Reaction using Logarithm to base 10 formula is defined as the rate of the reaction per concentration of the reactant. The formula is the logarithm to the base 10 of initial concentration per concentration at the time t, the whole is divided by the time required for the completion of the reaction. Rate Constant for First Order Reaction is denoted by kfirst symbol.

How to evaluate Rate Constant of First Order Reaction using Logarithm to base 10 using this online evaluator? To use this online evaluator for Rate Constant of First Order Reaction using Logarithm to base 10, enter Time for completion (tcompletion), Initial Concentration for First Order Reaction (A0) & Concentration at Time t (Ct) and hit the calculate button.

FAQs on Rate Constant of First Order Reaction using Logarithm to base 10

What is the formula to find Rate Constant of First Order Reaction using Logarithm to base 10?
The formula of Rate Constant of First Order Reaction using Logarithm to base 10 is expressed as Rate Constant for First Order Reaction = 2.303/Time for completion*log10(Initial Concentration for First Order Reaction/Concentration at Time t). Here is an example- 0.223845 = 2.303/4.3*log10(7500/800).
How to calculate Rate Constant of First Order Reaction using Logarithm to base 10?
With Time for completion (tcompletion), Initial Concentration for First Order Reaction (A0) & Concentration at Time t (Ct) we can find Rate Constant of First Order Reaction using Logarithm to base 10 using the formula - Rate Constant for First Order Reaction = 2.303/Time for completion*log10(Initial Concentration for First Order Reaction/Concentration at Time t). This formula also uses Common Logarithm (log10) function(s).
What are the other ways to Calculate Rate Constant for First Order Reaction?
Here are the different ways to Calculate Rate Constant for First Order Reaction-
  • Rate Constant for First Order Reaction=0.693/Half TimeOpenImg
  • Rate Constant for First Order Reaction=(2.303/Time for completion)*log10(Initial Reactant Volume/Volume at Time t)OpenImg
  • Rate Constant for First Order Reaction=1/Average timeOpenImg
Can the Rate Constant of First Order Reaction using Logarithm to base 10 be negative?
Yes, the Rate Constant of First Order Reaction using Logarithm to base 10, measured in First Order Reaction Rate Constant can be negative.
Which unit is used to measure Rate Constant of First Order Reaction using Logarithm to base 10?
Rate Constant of First Order Reaction using Logarithm to base 10 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 of First Order Reaction using Logarithm to base 10 can be measured.
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