In reply to the help needed on Stoichiometry. I use a double pan balance
placed on my teacher demo desk. I then get out a set of plastic chips I
purchased from Delta Education or one of the math catalogs. The plastic
chips are blue and red colors represents 1 g and 5 grams respectively. I
have the students help me make water from hydrogen and oxygen. I place a
blue chip on the left pan to represent hydrogen and then prod them to
remember it is diatomic so I need to double the chip. I do the same with
oxygen. Then I ask what should the right pan have. They tell me two blue
chips and one red. I put that on and they see it is not balanced so then
they tell me to repeat another two blue and one red on the right. When I do
that it is too heavy on the right side so then they see that I need to add
two more blue chips on the left side. I write these steps on the chalkboard
as well as we go. They really understand this. Then I ask them to half the
reaction and they help me do that and then it is balanced on the pans and
then on the chalkboard. Then I write the molar mass of each underneath the
elements and compounds and show that the left side again is equal to the
right side. My students like this demo and do very well on the
stoichiometry portion of the ACS tests.
However, this alone does not make them successful. I really have changed
the order I do chapters (different than the texts) and that has made the
difference in the grasp of all the concepts leading up to stoichiometry.
Good luck with this. Diane Warren and I will be presenting at NSTA in
Annaheim "Return of Survivor: Tips and Techniques to help Chemistry
Teachers Navigate through the Educational Jungle" - this will have a lot
more information.
Janice
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------------------------------------ kact Digest Fri, 13 Jan 2006 Volume: 02 Issue: 008
In This Issue: [KACT] lodging for conference [KACT] help!! [KACT] Re: lodging for conference [KACT] Re: help!! [KACT] Re: help!! [KACT] Student scholarship [KACT] Re: Student scholarship [KACT] Re: help!! [KACT] Re: Student scholarship [KACT] Re: help!! [KACT] Nancy cheering [KACT] Stoichiometry Fairy Tale [KACT] Re: Nancy cheering [KACT] Re: help!! [KACT] Re: Student scholarship [KACT] Re: Stoichiometry Fairy Tale
----------------------------------------------------------------------
From: "Trina Adams" <tadams@xxxxxxxxxxxxxxxxxxxxx> Subject: [KACT] lodging for conference Date: Fri, 13 Jan 2006 07:51:46 -0600
I'm planning on coming down the Friday night before the conference. Does anyone have suggestions on where to stay?
Trina Adams
tadams@xxxxxxxxxxxxxxxxxxxxx
Chemistry/Physics
Marysville High School
785 562 5386
------------------------------
Date: Fri, 13 Jan 2006 08:24:29 -0600 From: "London Reif" <lreif@xxxxxxxxxx> Subject: [KACT] help!!
Okay everyone I need some help here!
We are to the stoichiometry chapter in chemistry. I tried to introduce the chapter by putting a recipe on the board and asking how much of each ingredient we would need to double the recipe, half the recipe, and so on. Then I tried to use the same analogy to move to chemical equations.
So far we have talked about mole-mole problems, and mass-mass problems. Some students still cannot make the transition from the recipe idea to the chemical equation idea.
How do you all introduce it? Do you have any little tricks to help the students better understand the concept? Thanks for your input.
London Reif Hoisington High School
------------------------------
From: "Bohler,Nancy" <nbohler@xxxxxxxxxx> Subject: [KACT] Re: lodging for conference Date: Fri, 13 Jan 2006 09:39:25 -0600
Trina. It depends on how much you want to spend. It can run from a nice
motel in Haysville at a moderate price to the Marriott on the East side of
Wichita. What did you have in mind and I can email you some info.. N bohler
nbohler@xxxxxxxxxx
_____
From: kact-bounce@xxxxxxxxxxxxx [mailto:kact-bounce@xxxxxxxxxxxxx] On Behalf
Of Trina Adams
Sent: Friday, January 13, 2006 7:52 AM
To: kact@xxxxxxxxxxxxx
Subject: [KACT] lodging for conference
I'm planning on coming down the Friday night before the conference. Does anyone have suggestions on where to stay?
Trina Adams
tadams@xxxxxxxxxxxxxxxxxxxxx
Chemistry/Physics
Marysville High School
785 562 5386
------------------------------
Date: Fri, 13 Jan 2006 08:04:33 -0800 (PST) From: Kelly Deters <kellymdeters@xxxxxxxxx> Subject: [KACT] Re: help!!
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
---------------------------------
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Got holiday prints? See all the ways to get quality prints in your hands ASAP.
------------------------------
From: "Bohler,Nancy" <nbohler@xxxxxxxxxx> Subject: [KACT] Re: help!! Date: Fri, 13 Jan 2006 10:05:57 -0600
For the limiting factor I use the "S'Mores" approach. The kids really get into that one.. N
_____
From: kact-bounce@xxxxxxxxxxxxx [mailto:kact-bounce@xxxxxxxxxxxxx] On Behalf
Of Kelly Deters
Sent: Friday, January 13, 2006 10:05 AM
To: kact@xxxxxxxxxxxxx
Subject: [KACT] Re: help!!
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 <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.yah oo.com/ph/print_splash> all the ways to get quality prints in your hands ASAP.
------------------------------
Date: Fri, 13 Jan 2006 08:08:20 -0800 (PST) From: Kelly Deters <kellymdeters@xxxxxxxxx> Subject: [KACT] Student scholarship
With the discussion of the shirts, etc., Robert proposed that it be used to raise funds. I thought it would be a great idea to raise funds for a student scholarship. Then Robert generously suggested that his Law Practice would be willing to make a donation to supplement such a scholarship. So perhaps with some of the membership fee money (other than what's needed for other things), some from T-shirts and some from other donations, would could offer a scholarship for a student studying chemistry.
What does everyone think of the idea of having students write an essay on why they'd like to study chemistry and what they hope to do with it and then have a committee select a winner? We could send a letter to every high school and announce the scholarship...that way students from all high schools would have the opportunity...not just those with teachers that are members.
Kelly detersk@xxxxxxxxxxxxxx
---------------------------------
Yahoo! Photos
Ring in the New Year with Photo Calendars. Add photos, events, holidays, whatever.
------------------------------
Date: Fri, 13 Jan 2006 10:11:41 -0600 From: "London Reif" <lreif@xxxxxxxxxx> Subject: [KACT] Re: Student scholarship
By sending a letter to every school we give all students a chance to participate, and it gets our name out to the public. Any ideas on how we would select committee members? Would we do it on a volunteer basis? Have one or two people from each region? I like the idea.
kellymdeters@xxxxxxxxx 1/13/2006 10:08 am >>>With the discussion of the shirts, etc., Robert proposed that it be used to raise funds. I thought it would be a great idea to raise funds for a student scholarship. Then Robert generously suggested that his Law Practice would be willing to make a donation to supplement such a scholarship. So perhaps with some of the membership fee money (other than what's needed for other things), some from T-shirts and some from other donations, would could offer a scholarship for a student studying chemistry.
What does everyone think of the idea of having students write an essay on why they'd like to study chemistry and what they hope to do with it and then have a committee select a winner? We could send a letter to every high school and announce the scholarship...that way students from all high schools would have the opportunity...not just those with teachers that are members.
Kelly detersk@xxxxxxxxxxxxxx
--------------------------------- Yahoo! Photos Ring in the New Year with Photo Calendars. Add photos, events, holidays, whatever.
------------------------------
From: "Bohler,Nancy" <nbohler@xxxxxxxxxx> Subject: [KACT] Re: help!! Date: Fri, 13 Jan 2006 10:13:25 -0600
One of the things I use to teach Stoichiometry is the three step method: 1) Go for the moles! (change all quantities to moles)
2) Compare (compare the moles given to the moles wanted)
3) Go Back! (change the quantities back to the units wanted)
I have a cheer that I do for the kids called Go For the Moles!!!! .. Man!.
Once they have seen a old, fat lady to that cheer, . they DO NOT forget it.
( I have kids coming back from college telling me when they started stoich
in college, the memory of that cheer all came flooding back to haunt them.
Ha!) I don't know if that will help any... N
_____
From: kact-bounce@xxxxxxxxxxxxx [mailto:kact-bounce@xxxxxxxxxxxxx] On Behalf
Of London Reif
Sent: Friday, January 13, 2006 8:24 AM
To: kact@xxxxxxxxxxxxx
Subject: [KACT] help!!
Okay everyone I need some help here!
We are to the stoichiometry chapter in chemistry. I tried to introduce the
chapter by putting a recipe on the board and asking how much of each
ingredient we would need to double the recipe, half the recipe, and so on.
Then I tried to use the same analogy to move to chemical equations.
So far we have talked about mole-mole problems, and mass-mass problems. Some students still cannot make the transition from the recipe idea to the chemical equation idea.
How do you all introduce it? Do you have any little tricks to help the students better understand the concept? Thanks for your input.
London Reif
Hoisington High School
------------------------------
From: "Bohler,Nancy" <nbohler@xxxxxxxxxx> Subject: [KACT] Re: Student scholarship Date: Fri, 13 Jan 2006 10:14:10 -0600
I think this is a terrific idea. N
_____
From: kact-bounce@xxxxxxxxxxxxx [mailto:kact-bounce@xxxxxxxxxxxxx] On Behalf
Of Kelly Deters
Sent: Friday, January 13, 2006 10:08 AM
To: kact@xxxxxxxxxxxxx
Subject: [KACT] Student scholarship
With the discussion of the shirts, etc., Robert proposed that it be used to
raise funds. I thought it would be a great idea to raise funds for a
student scholarship. Then Robert generously suggested that his Law Practice
would be willing to make a donation to supplement such a scholarship. So
perhaps with some of the membership fee money (other than what's needed for
other things), some from T-shirts and some from other donations, would could
offer a scholarship for a student studying chemistry.
What does everyone think of the idea of having students write an essay on
why they'd like to study chemistry and what they hope to do with it and then
have a committee select a winner? We could send a letter to every high
school and announce the scholarship...that way students from all high
schools would have the opportunity...not just those with teachers that are
members.
Kelly
detersk@xxxxxxxxxxxxxx
_____
Yahoo! Photos Ring in the New Year with Photo <http://us.rd.yahoo.com/mail_us/taglines/photos/*http:/pa.yahoo.com/*http:/u s.rd.yahoo.com/mail_us/taglines/photos/evt=38087/*http:/pg.photos.yahoo.com/ ph/page?.file=calendar_splash.html&.dir=> Calendars. Add photos, events, holidays, whatever.
------------------------------
Subject: [KACT] Re: help!! Date: Fri, 13 Jan 2006 10:13:48 -0600 From: "Stockam, Angela" <adiskin@xxxxxxxxxx>
I use the recipe example also. But, before at the very beginning of the unit I have the students read the "Stoichiometry Fairytale Kingdom." Sometimes I have them work in groups and build a model of the kingdom that is described in the fairytale and sometimes I have them make a painting of it. The fairytale is great because it helps them sequence in their minds the process of doing mass-mass calculations.
After they have the story in their mind - the calculations don't seem so ominous to them - then I introduce the recipe analogy.
________________________________
From: kact-bounce@xxxxxxxxxxxxx [mailto:kact-bounce@xxxxxxxxxxxxx] On Behalf Of London Reif Sent: Friday, January 13, 2006 8:24 AM To: kact@xxxxxxxxxxxxx Subject: [KACT] help!!
Okay everyone I need some help here!
We are to the stoichiometry chapter in chemistry. I tried to introduce the chapter by putting a recipe on the board and asking how much of each ingredient we would need to double the recipe, half the recipe, and so on. Then I tried to use the same analogy to move to chemical equations.
So far we have talked about mole-mole problems, and mass-mass problems. Some students still cannot make the transition from the recipe idea to the chemical equation idea.
How do you all introduce it? Do you have any little tricks to help the students better understand the concept? Thanks for your input.
London Reif Hoisington High School
------------------------------
Date: Fri, 13 Jan 2006 08:17:43 -0800 (PST) From: Kelly Deters <kellymdeters@xxxxxxxxx> Subject: [KACT] Nancy cheering
I think Nancy should demonstrate that cheer to us all at the conference. A visual will definetly help! :)
Kelly
---------------------------------
Yahoo! Photos
Ring in the New Year with Photo Calendars. Add photos, events, holidays, whatever.
------------------------------
Date: Fri, 13 Jan 2006 08:22:52 -0800 (PST) From: Kelly Deters <kellymdeters@xxxxxxxxx> Subject: [KACT] Stoichiometry Fairy Tale
Angela, could you send a copy of that fairy tale...I'd like to see it (and I could put it on the webpage as well).
Kelly
detersk@xxxxxxxxxxxxxx
---------------------------------
Yahoo! Photos
Ring in the New Year with Photo Calendars. Add photos, events, holidays, whatever.
------------------------------
From: "Bohler,Nancy" <nbohler@xxxxxxxxxx> Subject: [KACT] Re: Nancy cheering Date: Fri, 13 Jan 2006 10:28:10 -0600
We don't want things to get "ugly" at the conference.. N
_____
From: kact-bounce@xxxxxxxxxxxxx [mailto:kact-bounce@xxxxxxxxxxxxx] On Behalf
Of Kelly Deters
Sent: Friday, January 13, 2006 10:18 AM
To: kact@xxxxxxxxxxxxx
Subject: [KACT] Nancy cheering
I think Nancy should demonstrate that cheer to us all at the conference. A
visual will definetly help! :)
Kelly
_____
Yahoo! Photos Ring in the New Year with Photo <http://us.rd.yahoo.com/mail_us/taglines/photos/*http:/pa.yahoo.com/*http:/u s.rd.yahoo.com/mail_us/taglines/photos/evt=38087/*http:/pg.photos.yahoo.com/ ph/page?.file=calendar_splash.html&.dir=> Calendars. Add photos, events, holidays, whatever.
------------------------------
Date: 13 Jan 2006 10:42:06 -0600 From: David Kadavy <dkadavy@xxxxxxxxxxxxxxxx> Subject: [KACT] Re: help!!
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=20 different approach. =A0 For limiting reactants, I use the "sandwhich" example.=A0 If it takes=20 2 pieces of bread,=A02 piece of cheese and 3 pieces of meat to have=20 a sandwhich, how many sandwiches can you make if you have...(and=20 then give a bunch of examples).=A0 Or you can use the brat example=20 (brats come in packages of 5, hot dog buns in packages of 8...what's=20 the limiting reactant).=A0 Those two have cleared up limiting reactants=20 for most any student I've explained them to...but that's assuming=20 you've already worked through the "muck" of stoichioemtry to begin=20 with. =A0 Maybe somebody will have another idea. =A0 Kelly detersk@xxxxxxxxxxxxxx =A0 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=3D38089/*http://pg.photos.yahoo.com/ph//print_= splash>=20to get quality prints in your hands ASAP.
------------------------------
Date: Fri, 13 Jan 2006 09:03:18 -0800 (PST) From: Kelly Deters <kellymdeters@xxxxxxxxx> Subject: [KACT] Re: Student scholarship
I think the committee including people from each region is an important idea! Thanks!
Kelly
--------------------------------- Yahoo! Photos - Showcase holiday pictures in hardcover Photo Books. You design it and we'll bind it!
------------------------------
Subject: [KACT] Re: Stoichiometry Fairy Tale Date: Fri, 13 Jan 2006 13:46:12 -0600 From: "Stockam, Angela" <adiskin@xxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Sure! I attached a copy of it to this!
________________________________
From: kact-bounce@xxxxxxxxxxxxx [mailto:kact-bounce@xxxxxxxxxxxxx] On Behalf Of Kelly Deters Sent: Friday, January 13, 2006 10:23 AM To: KACT@xxxxxxxxxxxxx Subject: [KACT] Stoichiometry Fairy Tale
Angela, could you send a copy of that fairy tale...I'd like to see it (and I could put it on the webpage as well). Kelly detersk@xxxxxxxxxxxxxx
________________________________
Yahoo! Photos Ring in the New Year with Photo Calendars <http://us.rd.yahoo.com/mail_us/taglines/photos/*http://pa.yahoo.com/*ht tp://us.rd.yahoo.com/mail_us/taglines/photos/evt=3D38087/*http://pg.photo= s .yahoo.com/ph//page?.file=3Dcalendar_splash.html&.dir=3D> . Add photos, events, holidays, whatever.
-- Binary/unsupported file stripped by Ecartis -- -- Type: application/msword -- File: A Stoichiometry Fairytale.doc -- Desc: A Stoichiometry Fairytale.doc
------------------------------
End of kact Digest V2 #8
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