Chemical Kinetics
$3.99
3.6for iPhone, iPad
Age Rating
Chemical Kinetics Screenshots
About Chemical Kinetics
The “Chemical Kinetics” is an ultimate tool for solving all kind of chemical kinetics problems. It deals with time dependent quantitative analysis of chemical reactions. Specifically, this application solves chemical reaction rate equations and provides graphical representation of reagent and product concentrations vs time. Additionally, app calculates half-life times and equilibrium constants, where it is appropriate.
Theoretical Background:
For a general chemical reaction:
aA + bB => cC + dD,
the reaction rate is defined by:
rate=k * A^x * B^y
where k – is a rate coefficient and sum of powers x and y determines the reaction order. Importantly, actual powers x and y may differ from reaction coefficients a and b, due to overall reaction mechanism complexity.
The application features:
· User is provided with list of basic mono-step unidirectional and equilibrium reactions, where reaction coefficients are actually represent powers and therefore define reaction order:
2A => B, rate = k[A]^2
A+B = C+D, rate = k1[A] [B] - k2[C] [D]
· k1 is a rate coefficient of forward reaction in equilibrium process or rate coefficient for first step in multistep process. Similarly, k2, when available, is a rate coefficient of backward reaction in equilibrium process or rate coefficient for second step in multistep process.
· To start plotting the reaction data initially or after updating the concentration or coefficient fields, user is requested to tap Run button. Run button is greyed out immediately after successful calculation.
· Complete reaction information is provided on top of the plot: concentrations at certain time point (defined by user or provided automatically), optionally equilibrium constant value and half-life time.
· When time field is empty, the app automatically determines the time range. To redefine reaction time limit and find out component concentrations at the altrnative time point, user may update the time field.
· Significant attention should be paid to units of rate coefficients. App automatically changes the set of available units as per order of reaction.
Units acronyms: d - days, h - hours, a - atmosphere, s - seconds, min - minutes, y - years, M -molars, Pa - pascals.
· The basic conversions are as follows:
M-1·s-1 = (1e-3) mM-1·s-1 = (60e-3) mM-1·min-1 = (3600) M-1·h-1
1 atm=101325 Pa
Theoretical Background:
For a general chemical reaction:
aA + bB => cC + dD,
the reaction rate is defined by:
rate=k * A^x * B^y
where k – is a rate coefficient and sum of powers x and y determines the reaction order. Importantly, actual powers x and y may differ from reaction coefficients a and b, due to overall reaction mechanism complexity.
The application features:
· User is provided with list of basic mono-step unidirectional and equilibrium reactions, where reaction coefficients are actually represent powers and therefore define reaction order:
2A => B, rate = k[A]^2
A+B = C+D, rate = k1[A] [B] - k2[C] [D]
· k1 is a rate coefficient of forward reaction in equilibrium process or rate coefficient for first step in multistep process. Similarly, k2, when available, is a rate coefficient of backward reaction in equilibrium process or rate coefficient for second step in multistep process.
· To start plotting the reaction data initially or after updating the concentration or coefficient fields, user is requested to tap Run button. Run button is greyed out immediately after successful calculation.
· Complete reaction information is provided on top of the plot: concentrations at certain time point (defined by user or provided automatically), optionally equilibrium constant value and half-life time.
· When time field is empty, the app automatically determines the time range. To redefine reaction time limit and find out component concentrations at the altrnative time point, user may update the time field.
· Significant attention should be paid to units of rate coefficients. App automatically changes the set of available units as per order of reaction.
Units acronyms: d - days, h - hours, a - atmosphere, s - seconds, min - minutes, y - years, M -molars, Pa - pascals.
· The basic conversions are as follows:
M-1·s-1 = (1e-3) mM-1·s-1 = (60e-3) mM-1·min-1 = (3600) M-1·h-1
1 atm=101325 Pa
Show More
What's New in the Latest Version 3.6
Last updated on Aug 9, 2023
Old Versions
Compatibility update.
Show More
Version History
3.6
Aug 9, 2023
Compatibility update.
3.5
Sep 1, 2022
Compatibility update.
3.4
Jan 19, 2022
Compatibility update.
3.3
Nov 6, 2021
Compatibility update.
3.2
Apr 1, 2021
Compatibility update.
3.1
Jan 10, 2021
Compatibility update.
3.0
Oct 12, 2020
Compatibility update.
2.9
Jun 10, 2020
Compatibility update.
2.8
Apr 2, 2020
Compatibility update.
2.7
Jan 25, 2020
Compatibility update.
2.5
Jun 6, 2018
Compatibility update.
2.4
Jan 22, 2018
Compatibility update.
2.3
Nov 27, 2017
Compatibility update.
2.2
Oct 22, 2017
Compatibility update.
2.0
Jun 19, 2017
Compatibility update.
1.9
Jul 11, 2016
Compatibility update.
1.7
May 4, 2016
Compatibility update.
1.6
Dec 18, 2015
Compatibility Update
1.5
Oct 13, 2015
Compatibility update.
1.2
Apr 27, 2015
Compatibility update
1.0
Apr 13, 2015
Chemical Kinetics FAQ
Click here to learn how to download Chemical Kinetics in restricted country or region.
Check the following list to see the minimum requirements of Chemical Kinetics.
iPhone
Requires iOS 16.0 or later.
iPad
Requires iPadOS 16.0 or later.
Chemical Kinetics supports English