Try using money. Give three students each a $5 bill and two students a $1 bill. Tell them this is a synthesis reaction so they are to get together to purchase a six dollar item. Ask them if it is the $5 bill or the $1 bill that limits how many items( the synthesis product) they can buy together. They tend to understand money. This in some sense helps them to understand stoichiometry and the proportions. David Kadavy On 1/13/2006 10:04 AM, Kelly Deters <kellymdeters@xxxxxxxxx> wrote: > >I, too, use the recipe example...so I can't give much help with a >different approach. > >For limiting reactants, I use the "sandwhich" example. If it takes >2 pieces of bread, 2 piece of cheese and 3 pieces of meat to have >a sandwhich, how many sandwiches can you make if you have...(and >then give a bunch of examples). Or you can use the brat example >(brats come in packages of 5, hot dog buns in packages of 8...what's >the limiting reactant). Those two have cleared up limiting reactants >for most any student I've explained them to...but that's assuming >you've already worked through the "muck" of stoichioemtry to begin >with. > >Maybe somebody will have another idea. > >Kelly >detersk@xxxxxxxxxxxxxx > > Yahoo! Photos > Got holiday prints? See all the ways > <http://us.rd.yahoo.com/mail_us/taglines/holidayprints/*http://pa.yahoo.com/*http://us.rd.yahoo.com/mail_us/taglines/photos/evt=38089/*http://pg.photos.yahoo.com/ph//print_splash> > >to get quality prints in your hands ASAP. *************************************************** Replying to this email will send it to the entire group--use individual email addresses if you wish to direct a response to individual members. To post to the mailing list, send email to kact@xxxxxxxxxxxxx To unsubscribe, change your settings or to search the archives, visit //www.freelists.org/list/kact