2.01 PADGen 2.0.1.22 http://www.padgen.org Portable Application Description, or PAD for short, is a data set that is used by shareware authors to disseminate information to anyone interested in their software products. To find out more go to http://www.asp-shareware.org/pad Ivano G. R. Gutz Instituto de Quimica - USP Av. Prof. Lineu Prestes, 748 Sao Paulo SP 05508-000 Brazil http://www2.iq.usp.br/docente/gutz/Curtipot_.html Ivano G. R. Gutz allchemy@iq.usp.br Ivano G. R. Gutz allchemy@iq.usp.br allchemy@iq.usp.br allchemy@iq.usp.br allchemy@iq.usp.br + 55 11 30912150 CurTiPot Acid-Base pH and Titration 3.6.1 03 06 2012 0 Freeware New Release No Install Support Win98,WinME,WinNT 3.x,WinNT 4.x,WinXP,Windows2000,Windows2003,Windows Vista Starter,Windows Vista Home Basic,Windows Vista Home Premium,Windows Vista Business,Windows Vista Enterprise,Windows Vista Ultimate,Windows 7 Home Basic,Windows 7 Home Premium,Windows 7 Professional,Windows 7 Ultimate English,Portuguese Automatic evaluation of multiple inflections in real and simulated titration curves with splines smoothing and interpolation Education Education::Science Chemistry, Science, Education, Teaching, Simulation, Graphics Microsoft Excel (1997 onwards, including Office for MAC) N Y N curtipot_.zip curt_323.zip curtipot_.zip curtipot_.zip 644096 629 0.60 N Uses indefinite use, for personal, educational and non-commercial purposes pH, acid, base, buffer, titration, potentiometry, electrode, equivalence point, inflection, dissociation constant, protonation, simulation, hydrolysis, analytical chemistry, chemical equilibrium, amino acid, calculator, hydronium Acid-base equilibria, pH and titration pH calculation, titration curve analysis and equilibria of acids and bases 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 interpolation, smoothing and nonlinear regression. A pH Calculator, a Virtual Titrator, a Real Titration Data Analyzer, a Distribution Diagram Generator - that's 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. Powerful all-in-one freeware for learning and practicing with acid-base reaction equilibria in high school, college or research laboratory, by: * calculating the pH of any aqueous solution of acids and bases (strong, weak or polyprotic), salts, buffers and complex mixtures, with buffer capacity and activity coefficient estimation; * generating graphics of the dissociated and undissociated fractions and buffer capacity of acids and bases versus pH (distribution diagrams) and along titrations; * simulating complete acid-base titration curves (pH versus volume of titrant) with the Virtual Titrator; * 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. The single-file Excel workbook comprises seven spreadsheets with graphics, instructions, examples, database and visual basic macros, which are uninstalled while closing the file. A pH Calculator, a Virtual Titrator, a Real Titration Data Analyzer, a Distribution Diagram Generator - that's 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 buffer capacity and 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 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. * Expandable database with pKa values of 250 acids and bases. Simply unzip the curtipot_.xls file, open it with Microsoft Excel, enable macros and start learning, working and teaching. No install/uninstall required, all macros are removed by closing the file. The software is completely free for educational and non-commercial not-for-profit use. http://www2.iq.usp.br/docente/gutz/Curtipot_.html http://www2.iq.usp.br/docente/gutz/Curtipot_.html http://www2.iq.usp.br/docente/gutz/Curtipot_Front.gif http://www2.iq.usp.br/docente/gutz/Curtipot_Icon.gif http://www2.iq.usp.br/docente/gutz/Curtipot_.xml http://www2.iq.usp.br/docente/gutz/curtipot/curtipot_.zip The PAD of CurTiPot can be freely distributed, indexed, included in directories and published, especially but not only, by software download sites. Sites willing to distribute the freeware file from their own servers or in other media are asked to include a link to the detailed information/update download page http://www2.iq.usp.br/docente/gutz/Curtipot_.html or to contact the author by the e-mail allchemy@iq.usp.br Thank you for your interest in CurTiPot version 3 freeware, a workbook of spreadsheets and macros written for Excel (proprietary software of Microsoft), authored by Dr. Ivano G. R. Gutz, Professor of the Institute of Chemistry of the University of São Paulo, São Paulo, Brazil, now on referred as Author. Please examine the License Agreement before you start using CurTiPot. - Non-profit Use Only - The Author grants you a non-exclusive and non-transferable freeware license of CurTiPot for your personal or educational use at home, in classroom or in academic laboratories. If you intend to make commercial use of CurTiPot, including but not limited to any profitable non-educational activity or selling or distributing CurTiPot for payment you must obtain a written permission from the Author in advance. - Restrictions - You may introduce modifications in the spreadsheets to suit your needs, but you are not allowed to remove the original notices about the intellectual property of the workbook and macros, in special but not only from the front page. You shall not distribute copies of modified versions without approval of the clearly identified changes by the author. - Distribution - You may share unmodified copies of CurTiPot with students and colleagues unable to download it from the Internet, if they agree to be bound to this Terms and Conditions and as long as you take all reasonable precautions to avoid exposure of your copy to viruses. To minimize risks, it is highly advisable to use only updated copies obtained from the Author’s download page. - Changes to Terms and Conditions - The author reserves the right to update CurTiPot and to modify these Terms and Conditions at its sole discretion, without notice or liability to you. You agree to be bound by these Terms and Conditions, as modified. Please download updated versions of CurTiPot from time to time and review the Terms and Conditions. - Disclaimer of Warranties - The Author disclaims any responsibility for any harm resulting from your use (or use by your colleagues or students) of CurTiPot and third party software used in conjunction with it. CurTiPot is provided "AS IS," with no warranties whatsoever, express, implied, and statutory, including, without limitation, the warranties of merchantability, fitness for a particular purpose, and non-infringement of proprietary rights. The author also disclaims any warranties regarding the security, reliability, accuracy, stability, convergence and performance of CurTiPot. You understand and agree that you download and/or use CurTiPot at your own discretion and risk and that you will be solely responsible for any consequences of incorrect information or results obtained with CurTiPot. This license does not entitle Licensee to receive from the Author any extra documentation not contained in the program file, support or assistance by any means, or enhancements or updates of CurTiPot other than those made available for download at the Author’s site. - Limitation of Liability - Under no circumstances shall the author or his employer be liable to any user on account its use or misuse of CurTiPot. - Acceptance of Terms and Conditions - If you accept the terms and conditions given above, you are entitled to use CurTiPot free of charge for unlimited time and number of uses. The Author will enjoy receiving your comments, error reports and suggestions by e-mail allchemy@iq.usp.brl.