pH & Titration Curves

pH and Titration Curves

version 3.3

[ Titration Curves | Purchasing the 32-bit version ]
[ VBScript pH Calculator | 16-bit version ]

Overview

pH and Titration Curves can be used:

By Students for drills with an almost unlimited number pH type problems,
As a quick way to calculate pH, pOH, hydrogen and hydroxide ion concentrations and degree of dissociation
To get worked solutions to real titrations,
By Teachers to generate an almost unlimited number of titration problems for testing,
By Teachers to create titration curves for use in resource sheets and exams.

The Acids and Bases Frame
Contains 5 option buttons:

Strong Acids & Strong Bases - Show a dropdown box with a selection of strong acids (or bases), and a textbox with the concentration of the acid (or base).
Weak Acids & Weak Bases - Show a dropdown box with a selection of weak acids (or bases), a textbox with the pKa of the acid (or pKb of the base), and a textbox with the concentration of the acid (or base).
Buffers - Shows a dropdown box with a selection of buffers (acid - base conjugate pairs), a textbox with the pKa of the acid, and a textbox with the ratio of concentration of acid : concentration of base.

note: All boxes are editable and Acids, Bases and Buffers can be Added and Edited using the built in Editor.
Only the Weak Acids and Weak Bases options enable the degree of dissociation (%) Question Type

Randomly generate a question, selecting from the Acids and Bases Frame and the Question Type Frame

Randomly generate a question keeping the settings in the Acids and Bases Frame and the Question Type Frame.

Open the solution window, containing an explanation of the answer.

Start the Titration Curves application

Open the application's Editor

Pop up the Windows calculator

Editable Boxes

For all of the options, the dropdown box and textboxes are editable, so you are not restricted to the acids, bases and buffers supplied with the pH program.
Also you can enter concentrations, pKa, pKb values and acid-conjugate base ratios, to generate solutions to problems from other sources.
Extremes of values pop up a warning message.

Options

Show or Hide the answer.
Round the Answer.
Use Assumptions - Applies to weak acids and weak bases.

Assumptions

For calculations involving weak acids this option assumes the initial concentration of acid is the same as the equilibrium concentration, ie. the acid is undissociated. Also that equilibrium concentration of hydrogen ions is equal to the equilibrium concentration of conjugate base.
Similarly, for calculations involving weak bases this option assumes the initial concentration of base is the same as the equilibrium concentration, ie. the base is undissociated. Also that equilibrium concentration of hydroxide ions is equal to the equilibrium concentration of conjugate acid.
Without the assumptions the program solves a quadratic to calculate a more exact value.

Answer Textbox

Enter your answer here.
It needs to be accurate to get marked correct.
You can see the working by clicking the Answer Window button , or have the answer always displayed in the window by checking Show Answer in the Options menu.

The Editor

The Acids, Bases and Buffers Editor allows you to customise what you work with.

Add or Edit available Acids Bases and Buffers.
Save any number of data files.

Registration & Purchasing

Chemware Order Form

Description and Online Ordering at The Virtual Software Store

Deutsche version - available from Compuchem

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