pH

Data input dialogue


Data input dialogue

Clicking Select on the iconbar icon, or choosing Enter data... from the iconbar icon menu will open the pH data input dialogue.

The data input dialogue is shown below.

The following data must be entered in the writable fields.

Preset examples

To the right of the acid name field is a popup menu button. The menu provided has three options, viz. mono-, di-, and triprotic, which lead to submenus, each containing a list of typical acids. Selecting one of these will enter the acids pK values, and a complete set of data to allow a graph of the full titration to be plotted immediately. The preset examples are currently 'hardwired' into the application, but should cover a wide variety of typical acids. The list of triprotic acids contains an entry 'Hypothetical'. The pK values for this have been set sufficiently far apart so that the three 'end points' are clear.


At the bottom of the dialogue are three action buttons.

Close

Pressing Close will close the dialogue. If a graph is already showing this will also be closed. Any data in the writable fields will be retained for when/if the dialogue is reopened.

Clear

Pressing Clear will simply remove any data that has been entered in to the writable fields, leaving a blank dialogue. If a graph is already showing this will be closed.

Graph

Pressing Plot will open a new window showing the details entered in the dialogue as a graph of pH plotted against the volume of base added. An example graph is shown in the next section.


These pages are best viewed in a CSS compliant browser. For RISC OS, Netsurf would be the browser of choice.

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pH is © Chris Johnson, 2006-2022
Email:chris@chris-johnson.org.uk