Glowing splint test
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- Posts: 6
- Joined: 13 Aug 2012, 11:15
- Job Title: Laboratory Technician
- School: John Willcock College
- Suburb: Geraldton
- State/Location: WA
Glowing splint test
Hi
One of the teacher at my school wants to do the glowing splint test and I have no idea what it is or what I need
Please help!
Hayley
One of the teacher at my school wants to do the glowing splint test and I have no idea what it is or what I need
Please help!
Hayley
Re: Glowing splint test
Hi Hayley,
I think it is the teachers job to tell you exactly what it is and what "they" need. Thats why they are paid the big bucks!!
I think it is the teachers job to tell you exactly what it is and what "they" need. Thats why they are paid the big bucks!!
Re: Glowing splint test
Is that the test for presence of oxygen? We use potassium permanganate and hydrogen peroxide then insert a splint that has been just extinguished and in the presence of oxygen the splint re-ignites (glows)
- Graham Kemp
- Posts: 173
- Joined: 22 Nov 2011, 09:21
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- School: St John's School
- Suburb: Roma
- State/Location: QLD
2 H2O2 =/MnO2=> 2 H2O + O2 Re: Glowing splint test
Heinemann Science 10 pg 208-209
--Using a Catalyst.
* spatula
* Manganese dioxide (MnO2 or substitute KMnO4)
* 5% Hydrogen peroxide
* glass measuring cylinder
* test tube
* aluminium foil (cap for test tube)
* glowing slplint
* matches
* Place a 1/4 spatula of Manganese dioxide into a test tube.
* Measure 5 mL of Hydrogen peroxide. Pour into the test tube and quickly cover the opening with aluminium foil.
* After a reasonable amount of gas has been collected, and while the reaction is still bubbling, remove the aluminium foil and plunge a glowing splint into the gas in the test tube.
* Record the observations. (Hopefully that the splint will ignite in released oxygen.)
--Using a Catalyst.
* spatula
* Manganese dioxide (MnO2 or substitute KMnO4)
* 5% Hydrogen peroxide
* glass measuring cylinder
* test tube
* aluminium foil (cap for test tube)
* glowing slplint
* matches
* Place a 1/4 spatula of Manganese dioxide into a test tube.
* Measure 5 mL of Hydrogen peroxide. Pour into the test tube and quickly cover the opening with aluminium foil.
* After a reasonable amount of gas has been collected, and while the reaction is still bubbling, remove the aluminium foil and plunge a glowing splint into the gas in the test tube.
* Record the observations. (Hopefully that the splint will ignite in released oxygen.)
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- Posts: 6
- Joined: 13 Aug 2012, 11:15
- Job Title: Laboratory Technician
- School: John Willcock College
- Suburb: Geraldton
- State/Location: WA
Re: Glowing splint test
awesome! thank you so much Im new to all this. where to do i buy hydrogen peroxide from??
Hayley
Hayley
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- Suburb: Tamworth
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Re: Glowing splint test
You can usually get 6% (also known as 20vol) at a chemist/pharmacy (we have a "pharmacy warehouse" chain that I get mine from). It is often cheaper than getting it from science suppliers. When you need the stronger stuff though you will need to get it from a supplier.
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- Posts: 6
- Joined: 13 Aug 2012, 11:15
- Job Title: Laboratory Technician
- School: John Willcock College
- Suburb: Geraldton
- State/Location: WA
Re: Glowing splint test
thank you
- Loopy
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Re: Glowing splint test
Hi Fellow Chemtalkers,
Just a question, Hasn't Maganese Dioxide been up graded in Hazard class to causing cancer?
Just a question, Hasn't Maganese Dioxide been up graded in Hazard class to causing cancer?
Lou P.
Learner Lab Technician
Wagga Wagga
NSW
Learner Lab Technician
Wagga Wagga
NSW
Re: Glowing splint test
Not sure but here's what is said in RiskAssess:
Anyway you're only supposed to use a tiny bit anyway, about this much: []
You can't use it to decompose potassium chlorate, which is a no-brainer anyway, since I'm pretty sure that is on the no-go list anyway.Potential hazards
Slightly toxic. Can be used safely as a catalyst for the decomposition of hydrogen peroxide solution to produce oxygen gas.
Anyway you're only supposed to use a tiny bit anyway, about this much: []
Cheers, K
- Graham Kemp
- Posts: 173
- Joined: 22 Nov 2011, 09:21
- Job Title: Laboratory Assistant
- School: St John's School
- Suburb: Roma
- State/Location: QLD
Re: Glowing splint test
Well, it was implicated as a reproductive toxin and suspected carcinogen; esp. if it contains crystaline silicate impurities. Handle responsibly.Loopy wrote:Hi Fellow Chemtalkers,
Just a question, Hasn't Maganese Dioxide been up graded in Hazard class to causing cancer?
Oh, yes! That explosive mix is on the banned chemistry list.smiley wrote:Not sure but here's what is said in RiskAssess:You can't use it to decompose potassium chlorate, which is a no-brainer anyway, since I'm pretty sure that is on the no-go list anyway.Potential hazards
Slightly toxic. Can be used safely as a catalyst for the decomposition of hydrogen peroxide solution to produce oxygen gas.
- Krysia Lee
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Re: Glowing splint test
We substitute potassium iodide for manganese dioxide and that works.
- Loopy
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- School: Mater Dei Catholic College
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- State/Location: NSW
Re: Glowing splint test
Thanks Smiley. I think I read something in a ChemWatch bulletin. I must go and recheck past issues. Gee, I wish my memory was like it used to be!
Lou P.
Learner Lab Technician
Wagga Wagga
NSW
Learner Lab Technician
Wagga Wagga
NSW
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Re: Glowing splint test
I'm with lab-woman... Make sure this is what the teacher means!
- DavidPeterson
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Re: Glowing splint test
Manganese dioxide is still an approved substance here in SA - based on the current (April 2012) DECD Approved Substances & Risk Assessment Register
DCP
STEM Resource @ Laboratory Manager
RPAS (Drone) Pilot
STEM Resource @ Laboratory Manager
RPAS (Drone) Pilot
Re: Glowing splint test
Here in WA Manganese dioxide is classified hazardous, the dust is not good for you.
We mix the Manganese dioxide with Plaster of Paris, and cut into small pellets when
set. Use 3-4 pellets in a test tube with Hydrogen peroxide. No dust problems or black
powder everywhere!
Alice
We mix the Manganese dioxide with Plaster of Paris, and cut into small pellets when
set. Use 3-4 pellets in a test tube with Hydrogen peroxide. No dust problems or black
powder everywhere!
Alice
- Graham Kemp
- Posts: 173
- Joined: 22 Nov 2011, 09:21
- Job Title: Laboratory Assistant
- School: St John's School
- Suburb: Roma
- State/Location: QLD
Yoik! Re: Glowing splint test
Oh, I do like that. It is a rather good idea, Alice.Alice wrote:We mix the Manganese dioxide with Plaster of Paris, and cut into small pellets when
set. Use 3-4 pellets in a test tube with Hydrogen peroxide. No dust problems or black
powder everywhere!
I might try it out for next time. What ratio of manganese dioxide and plaster do you find best?
Re: Glowing splint test
Hey yeah we do that too. I've made pellets in the past by mixing 1 teaspoon of MnO2 & a teaspoon of plaster in a little takeaway container. Then I spread out a sheet of cling wrap, and drip little blips of mixture onto the wrap, and let them dry. They kinda look like choc-bits. Great for no-mess reactions.
Thanks for reminding me Alice.
Thanks for reminding me Alice.
Cheers, K
- rae
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Re: Glowing splint test
Is it recyclable or do you dispose of it when the experiment is done??
Re: Glowing splint test
Yeah, they pretty much are. And even when they are fairly eroded by H2O2, it minimal amounts one is tossing, and even then they are stabilized by the plaster. I've had the same jar so long, I'd forgotten I had it!
Cheers, K
Re: Glowing splint test
Hi Graeme and everyone
I usually mix half and half Manganese dioxide and Plaster of Paris.
I also spread it over gladwrap and cover it with gladwrap until it is set.
I usually make it about 3mm thick. I cut it with a small chisel into squares.
You can also just break it into pieces, as long as they fit into a flask or
test tube.
Yes, you can reuse it. I just keep it in an airtight jar.
Alice
I usually mix half and half Manganese dioxide and Plaster of Paris.
I also spread it over gladwrap and cover it with gladwrap until it is set.
I usually make it about 3mm thick. I cut it with a small chisel into squares.
You can also just break it into pieces, as long as they fit into a flask or
test tube.
Yes, you can reuse it. I just keep it in an airtight jar.
Alice