titration
CurTiPot Acid-Base pH and Titration 3.4.1
A pH Calculator, a Virtual Titrator, a Real Titration Data Analyzer, a Distribution Diagram Generator - thats CurTiPot, the all-in-one freeware with interpolation, smoothing, simulation, nonlinear regression, graphics and database. Simply open the MS-Excel file, habilitate macros and start learning and working with chemical equilibrium of acids, bases, salts and buffers at home, classroom and laboratory. more>>
CurTiPot Acid-Base pH and Titration - A pH Calculator, a Virtual Titrator, a Real Titration Data Analyzer, a Distribution Diagram Generator - thats CurTiPot, the all-in-one freeware to learn, teach and work with chemical equilibrium of acids, bases, salts and buffers at home, classroom, interactive "dry lab", routine or research laboratory. Features of this powerful suite of MS Excel spreadsheets embrace:
* pH calculation of any aqueous solution of strong and weak acids, bases, salts, buffers and mixtures of up to 7 polyprotic systems (>40 species), with activity coefficient estimation;
* Simulation and overlay of acid-base titration curves of any complexity, with or without random errors in pH and/or volume. Valuable for teaching, generation of unlimited titration exercises and evaluation of the feasibility and accuracy of new titrations.
* Analysis of pH vs. volume data from simulated and real potentiometric titration curves by two methods: i) graphical representation of curves, assisted by cubic splines interpolation and smoothing of derivative curves, for accurate evaluation of inflections (end-points); ii) determination of concentrations and refinement of pKa values by multiple nonlinear regression (based on the Solver supplement of Excel), essential for difficult titrations with undefined inflections, e.g., acid rain.
* Generation of protonation curves and distribution diagrams of equilibrium species of acids and bases at equilibrium as a function of pH or of added volume of titrant.
* Expandable database with pKa values of 250 acids and bases.
Simply unzip the curtipot_.xls file, open it with Microsoft Excel, habilitate macros and start learning, working and teaching. No install/uninstall required, all macros are removed by closing file. The software is completely free for educational and non-commercial not-for-profit use.
Enhancements:
Version 3.4.1
Regression data analysis including activity calculation; Vista / Excel 2007 compatible; quick pKa loading from database
Version 3.3.2
pH sensor calibration refinement added; Excel 2007 compatible; quick pKa loading; log(alpha) on titration curves
System Requirements:<<less
pH calculation, titration curve analysis and equilibria of acids and basesLicense:Freeware
Ivano G. R. Gutz - Acid-base equilibria, pH and titration. CurTiPot
CurTiPot pH and Acid-Base Titration Curves 3.1.1
Compute pH of any aqueous solution of acids, bases, and other mixtures. more>>
CurTiPot pH and Acid-Base Titration Curves 3.1.1 is created as an integrated and versatile tool which helps effectively with acid-base equilibria learning and practicing, in high school, college or research laboratory.
Major Features:
- Calculating the pH of any aqueous solution of acids and bases (strong, weak or polyprotic), salts and complex mixtures
- Generating graphics of the dissociated and undissociated fractions of acids and bases as a function of pH (distribution diagrams)
- Evaluating the effect on pH by adding strong acid or strong base to a buffer
- Simulating complete acid-base titration curves (pH versus volume of titrant)
- Analyzing potentiometric titration curves by graphical methods with interpolation and smoothing or by nonlinear regression, to determine concentrations and pKas of real samples, from vinegar to acid rain.
Enhancements:
- A single-file Excel workbook with seven spreadsheets comprising graphics, instructions, examples, database and visual basic macros
- Uninstalled while closing the file (former versions, from 1992 up, run only in DOS).
CurTiPot pH & Acid-Base Titration Curves 3.1 3.2
All-in-one freeware for pH and equilibrium calculations, real data analysis and simulation of titration curves of acids, bases, salts and buffers (from simple solutions to complex mixtures) with inter more>>
- pH calculations of strong, weak an multiprotic acids, bases, salts and their buffers and mixtures (over 30 species at once) in aqueous medium, with estimation of activity coefficients by the Davies equation;
- Analysis of pH vs. volume of titrant data of simulated and real potentiometric titration curves by two methods: i) graphical representation of curves, assisted by cubic splines interpolation and smoothing of derivative curves for accurate evaluation of inflections (end-points); ii) determination of concentrations and refinement of pKa values by multiple nonlinear regression (based on the Solver supplement of Excel), essential for difficult titrations with undefined inflections, for example, acid rain.
- Simulation and overlay of acid-base titration curves of any complexity, without or with simulated random experimental error in pH and/or volume. Valuable for teaching, generation of unlimited titration exercises and evaluation of the feasibility and accuracy of new titrations.
- Generation of protonation diagrams and distribution curves of the equilibrium species of acids and bases as a function of pH or of added volume of titrant.
All necessary spreadsheets with graphics, examples, instructions, database and visual basic macros are contained in the single curtipot_.xls file. Simply unzip it, open it with Microsoft Excel (at medium security level), activate macros and start learning and working. No install/uninstall required, all macros removed when closing file.
License:Freeware
ProtoFit 2.1 rev1
Analyzing Potentiometric Titration Data, Optimizing Surface Protonation Models more>> ProtoFit is a tool for optimization of surface protonation models from acid-base titration data. The software consists of two parts: ProtoFit, which is the program for model parameter optimization and simulation; and ProtoFit-GUI, a graphical user interface to ProtoFit with data and model visualization capabilities. ProtoFit-GUI provides for easy simulation of titrations and graphical comparison of model with measurements.
ProtoFit can be used to optimize surface protonation models with up to four discrete surface sites. The models may include the Double Layer Model (DLM), Constant Capacitance Model (CCM), Donnan Shell Model (DSM), and a non-electrostatic model (NEM). Activity coefficients can be modeled by the Davies, Truesdell-Jones, and Extended Debye-Huckel equations, or it can be assumed that activity coefficients equal 1.
For the purpose of protonation model optimization, ProtoFit is an alternative to the widely-used program FITEQL (e.g. Westall, 1982; Herbelin and Westall, 1999)*. While FITEQL is designed to solve a much wider range of problems, ProtoFit has unique features useful for analysis of titration data as well as a fundamentally different approach to model optimization<<less
Chemspread PRO 3.3
Free Java Applet is a chemistry spreadsheet calculator - balances virtually any chemical equation and follows up with stoichiometry calculations as well as equillibruim calculations more>>
Chemspread PRO 3.3 offers you a science related product which balances virtually any chemical equation and follows up with stoichiometry calculations as well as equillibruim calculations. Percentage mass, titrations, ideal and non-ideal gases.
Knows the periodic table and computes molecular weight of all entries. Partial pressures and Van der Waal equation. Gravemetric analysis. Includes tutorial.
Enhancements: Version 3.3 may include unspecified updates, enhancements, and bug fixes.
Percentage mass, titrations, ideal and non-ideal gases. Knows the periodic table and computes molecular weight of all entries. Partial pressures and Van der Waals equation. Tutorial has 26- Page: 1 of 1
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