Toolbox

GraphPad GraphPad builds a simple graph from your laboratory data and emails a GIF file to you for inclusion in your reports or Web pages. Simple linear regression is included.
Browser requirements: Any graphical browser; no Javascript or Java required.

Popup Periodic Table This simple periodic table was designed to be used as a very quick popup reference on cgi-based chemistry tests, not as a comprehensive element database. Most of the excellent (but cyclopean) periodic tables now on the Web require a client-server dialog every time the user requests an atomic weight. Being JavaScript, this table executes entirely on your browser. That takes a load off your server when you are testing very large classes — and a client-side table works even when you're offline. The table is sized to fit a default browser window comfortably.
Browser requirements: Javascript 1.1 or better.

Gas Law Calculator This script solves the ideal gas, van der Waals, and Dieterici equations of state for pressure, volume, temperature, or moles in a variety of convenient units. Semiempirical parameters are computed from critical point data — a database of common gases is included in the script, but you can input your own critical point data if you wish. The Boyle temperature and the critical compressibility factor are computed for the semiempirical equations, as well.
Browser requirements: Javascript 1.1 or better.

Water Vapor Pressure Oxygen Solubility Calculator A quick DO calculator based on empirical functions for oxygen solubility taken from Standard Methods for Waste and Wastewater Analysis. Enter the barometric pressure in torr, and the water temperature in °C. Hit the Calculate button to see the saturated water vapor pressure and the
predicted DO concentration.
Browser requirements: Javascript 1.1 or better.


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