There are many different open source licenses but they all must comply with the Open Source Definition - in brief: the software can be freely used, modified and shared. Programs released under this license can be used at no cost for both personal and commercial purposes. Open Source software is software with source code that anyone can inspect, modify or enhance. Freeware products can be used free of charge for both personal and professional (commercial use). The software is completely free for educational and non-commercial not-for-profit use.Freeware programs can be downloaded used free of charge and without any time limitations. No install/uninstall required, all macros are removed by closing the file. Simply unzip the curtipot_.xls file, open it with Microsoft Excel, enable macros and start learning, working and teaching. * Expandable database with pKa values of 250 acids and bases.
* Generation of acid-base species distribution diagrams and curves of buffer capacity, protonation level and average charge as a function of pH and added volume of titrant, with isoelectric point detection. 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. Valuable for teaching, generation of unlimited titration exercises and evaluation of the feasibility and accuracy of new titrations. * Simulation and overlay of acid-base titration curves of any complexity, with or without random errors in pH and/or volume. * 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 buffer capacity and activity coefficient estimation
Features of this powerful suite of MS Excel spreadsheets embrace: 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.
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