CASC helps calculate recipes for solution preparation regardless of number of compunds used. Built in concentration calculator converts concentrations between percent, molarity, molality and molar fractions, automatically taking density changes into account thanks to built in database of substances. It can be also used to find answers to most solution questions you may think off or find in textbooks as it can find any unknown - concentration, amount of solution, amount of substance - if other values are given. There is also a solution mixer - which does almost every kind of calculations involving three solutions - two mixed and one obtained.