Handbook - McDalton Learning Edition

How to use

In this program there are not drawn up any special rules for typing chemical formulas. Just type them as you normally do. Please use proper capitalisation. For example Co means Cobalt while CO means Carbon and Oxygen. Numbers will automatically be shown in subscript except when used for crystal water. You may use multiple levels of brackets. Some examples of typing are

  • H2O for Water
  • CuSO4*5H2O for Copper sulfate pentahydrate
  • Mg(OH)2 for Magnesium hydroxide

Press the Enter button for the calculations to start. As default the calculations are shown and all figures are used in the calculations.

Most textbooks include an atomic mass table with values rounded to one or two decimals. For compatibility with answers on examples given in those textbooks McDalton Learning Edition includes the option to use a fixed number of decimals. This may also increase the readability of the output. You may choose this under the View menu.

The best value is displayed when Best round off result is selected from the View menu. In that case the formula mass is rounded to the same absolute accuracy as given in the calculated uncertainty. The calculations are not shown in this case.

If under the View menu Molar mass is selected the caption of the output is changed.

By recommendation of The International Union of Pure and Applied Chemistry, IUPAC, atomic weights of the elements are taken from the review Atomic weights of the elements 2007, published in Pure Appl. Chem. 78(11), 2051-2066, 2006 and Aug 2007 release. If you enter the formula of just one element the recommended atomic weight is displayed unless calculations with a fixed number of decimals is selected.


License agreement

Except where otherwise noted, all documentation and software included in the McDalton Learning Edition package is copyrighted by Dr. Christer Svensson.

Copyright (©) 2001-2008 Dr. Christer Svensson. All rights reserved.

This software is provided "as-is," without any express or implied warranty. In no event shall the author be held liable for any damages arising from the use of this software.