Here is the flowchart that we completed in class to go through all the steps in the process:
The practice problems we did in class were not difficult at all, instead they were nearly identical to what we had done before. The first problem was a limiting reagent problem in which we had to add an extra step to help convert for the molarity of the solutions. First to find the mass we had to use the moles of the solute over total volume of the solution (solute and solvent together) to be able to find the moles in the reactants. Then we did conversions we were familiar with to convert to grams by using normal mole to mole ratio and molar masses. Then we knew whichever created the smaller mass was the limiting reagent, just like previous problems we have worked with.
And here is the chart nearly identical to what is in our book, and this is what Mrs. Frankenberg showed us to help solve for the next steps in solving problems like this.
http://img.docstoccdn.com/thumb/orig/641889.png |
http://misterguch.brinkster.net/PRA048.pdf
http://www.chemcollective.org/activities/tutorials/stoich/solution_stoi
http://www.eiu.edu/eiuchem/genchem/tutorial4.pdf
This was a great post Holly! I agree with you on the note that this is the exact same thing as we learned previously. I really appreciate the links you added and the flow chart you put in case someone still didn't understand the concept.
ReplyDeleteHolly, to be honest I did not understand the stochimoetry part in this unit. Your explanation of the notes from class gave me a simplified idea on how to look at these problems. The way that I now approach these problems are like converting grams to molecules, the only difference is that you start with liters, convert to moles using the molarity given then convert to volume. Thanks.
ReplyDeleteThe flow chart from the notes that you added was helpful. Also the links were very helpful in understanding, and practicing these problems.
ReplyDeleteThis blog post is stocked full of information. After taking the test last week, I know which ones I missed after looking at your blog post. You do a great job of explaining the stoichiometry section of the lessons. Not only that but your pictures and links are awesome.
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