Stoichiometry Pro
$3.99
2.0for iPhone, iPad
Age Rating
Stoichiometry Pro Screenshots
About Stoichiometry Pro
Stoichiometry Pro targets common stoichiometric tasks: balancing chemical reactions of unlimited number of components, finding molar masses, moles and masses of reactants and products and defining the limiting reagent, based on chemical formulas, stoichiometric coefficients, and any quantitative data provided.
The app analyses chemical reaction typed in “Reaction” field, balances it (if possible), finds molar masses and builds table with list of compounds (reagents and products coloured differently), for quantitative data input. All that triggered by pressing the = button.
Example 1: How many moles of H3PO4 are needed in order to obtain 2.0 g of NH4NO3, in the reaction:
H3PO4 + (NH4)2MoO4 + HNO3 = (NH4)3PO4(MoO3)12 + NH4NO3 + H2O
Solution: The first step is balancing chemical reaction and finding molar masses, since moles-mass conversion is needed. Reaction is balanced and all molar masses are calculated automatically by pressing the “=” button.
H3PO4 + 12(NH4)2MoO4 + 21HNO3 = (NH4)3PO4(MoO3)12 +21NH4NO3 + 12H2O,
The next step is to find the moles of NH4NO3 from the mass (2.0 g), and then convert them to moles of H3PO4 based on 1:21 ratio obtained from the balanced reaction. Stoichiometry application provides data table that comprised of masses and mole rows for data available before reaction initiated and obtained or left after the reaction is accomplished. When calculate button that pointing towards products, ▶▶ is pressed, the final masses and moles are calculated from the initially provided amounts of reactant and products. On the opposite, when the calculate button pointing left,◀◀, is pressed, then initial reactant and product amounts that would be required to achieve the provided final state are calculated. The later is exactly matches our situation, as we need to find the initial amount of H3PO4 from the final, known NH4NO3 mass. So we set the NH4NO3 mass (2.0 g) to the final mass field and press calculate button ◀◀ to automatically fill the table with all masses and moles for all components. Apparently, 1.19 mmoles of H3PO4 are required to get 2.0 g of NH4NO3.
Important Points:
Either moles or masses can be filled in, but if both are provided and they don’t match, then the moles value will have a preference.
For balancing redox reactions please refer to Electrochemistry application.
The app analyses chemical reaction typed in “Reaction” field, balances it (if possible), finds molar masses and builds table with list of compounds (reagents and products coloured differently), for quantitative data input. All that triggered by pressing the = button.
Example 1: How many moles of H3PO4 are needed in order to obtain 2.0 g of NH4NO3, in the reaction:
H3PO4 + (NH4)2MoO4 + HNO3 = (NH4)3PO4(MoO3)12 + NH4NO3 + H2O
Solution: The first step is balancing chemical reaction and finding molar masses, since moles-mass conversion is needed. Reaction is balanced and all molar masses are calculated automatically by pressing the “=” button.
H3PO4 + 12(NH4)2MoO4 + 21HNO3 = (NH4)3PO4(MoO3)12 +21NH4NO3 + 12H2O,
The next step is to find the moles of NH4NO3 from the mass (2.0 g), and then convert them to moles of H3PO4 based on 1:21 ratio obtained from the balanced reaction. Stoichiometry application provides data table that comprised of masses and mole rows for data available before reaction initiated and obtained or left after the reaction is accomplished. When calculate button that pointing towards products, ▶▶ is pressed, the final masses and moles are calculated from the initially provided amounts of reactant and products. On the opposite, when the calculate button pointing left,◀◀, is pressed, then initial reactant and product amounts that would be required to achieve the provided final state are calculated. The later is exactly matches our situation, as we need to find the initial amount of H3PO4 from the final, known NH4NO3 mass. So we set the NH4NO3 mass (2.0 g) to the final mass field and press calculate button ◀◀ to automatically fill the table with all masses and moles for all components. Apparently, 1.19 mmoles of H3PO4 are required to get 2.0 g of NH4NO3.
Important Points:
Either moles or masses can be filled in, but if both are provided and they don’t match, then the moles value will have a preference.
For balancing redox reactions please refer to Electrochemistry application.
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What's New in the Latest Version 2.0
Last updated on Aug 8, 2023
Old Versions
Compatibility update.
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Version History
2.0
Aug 8, 2023
Compatibility update.
1.9
Jul 18, 2022
Compatibility update.
1.8
Jan 20, 2022
Compatibility update.
1.7
Aug 4, 2021
Compatibility update.
1.6
May 27, 2021
Compatibility update.
1.5
Apr 4, 2021
Compatibility update.
1.4
Jan 14, 2021
Compatibility update.
1.2
Jan 1, 2021
Stoichiometry Pro FAQ
Click here to learn how to download Stoichiometry Pro in restricted country or region.
Check the following list to see the minimum requirements of Stoichiometry Pro.
iPhone
Requires iOS 16.0 or later.
iPad
Requires iPadOS 16.0 or later.
Stoichiometry Pro supports English
