 Does Anyone Know Where I Can Buy ...., some dilute sulphuric acid? |
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| Does Anyone Know Where I Can Buy ...., some dilute sulphuric acid? |
| zoda |
 Jan 4 2007, 08:50 PM
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#1
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Unregistered  |
just a little bottle - I want to show the children a simple experiment and I think this would speed it up a bit.
I feel a bit guilty starting a thread just for this one question - if anyone else is searching for bits and bobs, odds and sods, feel free to use this thread and post below (IMG:style_emoticons/default/smile.gif) |
 
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| anacrusis |
Jan 4 2007, 08:57 PM
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#2
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Virtuoso  Group: Members Posts: 5231 Joined: 1-October 05 From: Edinburgh, Scotland Member No.: 4852 |
Phew, at first I thought somebody had been making caustic remarks again! (IMG:style_emoticons/default/laugh.gif)
Many apologies for replying when I don't have an answer - but what experiment is it you need to do? Could you use domestic vinegar instead? |
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| notmusimum |
Jan 4 2007, 09:01 PM
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#3
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Maestro Group: Members Posts: 8328 Joined: 23-January 06 Member No.: 5959 |
QUOTE(anacrusis @ Jan 4 2007, 08:57 PM)  Phew, at first I thought somebody had been making caustic remarks again! (IMG:style_emoticons/default/laugh.gif) Many apologies for replying when I don't have an answer - but what experiment is it you need to do? Could you use domestic vinegar instead? What about Stop bath, the thing photographers used to use in between devloping and fixing B&W photos. Don't know if it would work for what you want but it is stronger than vinegar. |
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| zoda |
Jan 5 2007, 12:12 AM
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#4
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Unregistered |
thanks, notmusicmum, I'll try the photography link (IMG:style_emoticons/default/smile.gif)
anacrusis (IMG:style_emoticons/default/laugh.gif) I want to do that experiment where you turn water into hydrogen and oxygen. Not sure if vinegar would work - I tried to ionise the water with a pinch of salt and didn't get any oxygen (someone told me the oxygen nabbed electrons from the chlorine ions and displaced them as chlorine gas, which then got re-dissolved in the water.) I'm not sure ethanoic acid (is that what vinegar is?) is powerful enough to displace oxygen. sorry for buzzing off earlier after posting (and again now (IMG:style_emoticons/default/ph34r.gif) - I'll check in again tomorrow ) |
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| anacrusis |
Jan 5 2007, 12:53 AM
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#5
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Virtuoso Group: Members Posts: 5231 Joined: 1-October 05 From: Edinburgh, Scotland Member No.: 4852 |
It's so long since I did chemistry....I can only remember the wonderful explosion which resulted when a science teacher bubbled two parts hydrogen to one part oxygen into a washing-up bowl full of soapy water some thirty years ago when I was at primary school, and then ignited the result (IMG:style_emoticons/default/laugh.gif) (IMG:style_emoticons/default/laugh.gif) (IMG:style_emoticons/default/laugh.gif) . The technician came running in a complete panic, poor fellow, to see what on earth had happened. Sadly though this is the reverse of what you're trying to do. I'm afraid my ventures into amateur chemistry with the kids have been limited to making a volcano out of clay and filling the crater with red food colouring, bicarb and vinegar...
Vinegar is a pretty weak acid, right enough. |
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| ianporsche |
Jan 5 2007, 07:00 AM
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#6
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Prodigy Group: Members Posts: 1175 Joined: 13-May 05 Member No.: 3666 |
Any car parts shop should sell sulfuric acid (as battery acid) except possibly halfords who only sell stereos and snow chains.
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| TSax |
Jan 5 2007, 09:28 AM
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#7
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Virtuoso Group: Members Posts: 2618 Joined: 14-December 05 From: London Member No.: 5567 |
Do you have these instructions (or similar) already?
http://www.chemsoc.org/networks/learnnet/v...olysiswater.pdf |
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| sonataform |
Jan 5 2007, 10:13 AM
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#8
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Advanced Member Group: Members Posts: 637 Joined: 1-November 06 From: Argyll, Scotland Member No.: 8133 |
QUOTE(ianporsche @ Jan 5 2007, 07:00 AM) Any car parts shop should sell sulfuric acid (as battery acid) except possibly halfords who only sell stereos and snow chains. Eh? When I ran a car parts shop we only sold battery acid in batteries. |
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| ianporsche |
Jan 5 2007, 10:18 AM
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#9
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Prodigy Group: Members Posts: 1175 Joined: 13-May 05 Member No.: 3666 |
Really ?
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| fsharpminor |
Jan 5 2007, 10:57 AM
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#10
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Maestro Group: Members Posts: 12255 Joined: 7-June 06 From: Wirral (originally Keighley, Yorks) Member No.: 7089 |
QUOTE(ianporsche @ Jan 5 2007, 10:18 AM) Really ? I am a graduate chemist , and have worked in the industry all my life. The only feasible way of splitting water into hydrogen and oxygen is by electrolysis. You really need special equipment, for hevans sake dont connect the mains to it ! (IMG:style_emoticons/default/laugh.gif) (IMG:style_emoticons/default/ph34r.gif) You can dissolve a reactive metal such as zinc into a dilute acid like hydrochloric or dilute sulphuric, and you will get hydrogen coming off, but you wont get any oxygen that way, you end up with the hydrogen and zinc chloride/sulphate solution depending on the acid. |
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| ianporsche |
Jan 5 2007, 12:36 PM
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#11
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Prodigy Group: Members Posts: 1175 Joined: 13-May 05 Member No.: 3666 |
QUOTE(anacrusis @ Jan 4 2007, 08:57 PM) Phew, at first I thought somebody had been making caustic remarks again! (IMG:style_emoticons/default/laugh.gif) Many apologies for replying when I don't have an answer - but what experiment is it you need to do? Could you use domestic vinegar instead? Vitriolic remarks would be more likely ! (vitriol is another name for sulfuric acid whereas caustic refers to sodium hydroxide). Photographic stop bath is a dilute solution of acetic acid so would be the same as vinegar. Please don't electrolyse solutions containing salt as you will get chlorine gas coming off and you don't want to poison the children ! I agree with fsharpminor- electrolysis of water is quite tricky and you need the correct equipment. The zinc in acid would be an easier experiment to perform as you'd only need some acid, a beaker and a test tube. |
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| hazel |
Jan 5 2007, 01:03 PM
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#12
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Advanced Member Group: Members Posts: 683 Joined: 14-March 06 From: Midlands Member No.: 6445 |
QUOTE(anacrusis @ Jan 5 2007, 12:53 AM) It's so long since I did chemistry....I can only remember the wonderful explosion which resulted when a science teacher bubbled two parts hydrogen to one part oxygen into a washing-up bowl full of soapy water some thirty years ago when I was at primary school, and then ignited the result :lol: :lol: :lol: . The technician came running in a complete panic, poor fellow, to see what on earth had happened. Sadly though this is the reverse of what you're trying to do. I'm afraid my ventures into amateur chemistry with the kids have been limited to making a volcano out of clay and filling the crater with red food colouring, bicarb and vinegar... Vinegar is a pretty weak acid, right enough. Ooh, we did the volcano thing last week (7 yr old got Chem set for Xmas!). Warming the vinegar slightly in the microwave seemed to speed it up a bit :D Zoda - do you know anyone who works in a secondary school? They might be able to get you a bit from the Chem lab. Hazel |
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| sonataform |
Jan 5 2007, 05:39 PM
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#13
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Advanced Member Group: Members Posts: 637 Joined: 1-November 06 From: Argyll, Scotland Member No.: 8133 |
QUOTE(ianporsche @ Jan 5 2007, 10:18 AM) Really ? Well, it wasn't my department, but I'm pretty sure we didn't sell it across the counter, and DEFINITELY not mail order (IMG:style_emoticons/default/smile.gif) |
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| anacrusis |
Jan 6 2007, 12:49 AM
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#14
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Virtuoso Group: Members Posts: 5231 Joined: 1-October 05 From: Edinburgh, Scotland Member No.: 4852 |
QUOTE(ianporsche @ Jan 5 2007, 12:36 PM) QUOTE(anacrusis @ Jan 4 2007, 08:57 PM) Phew, at first I thought somebody had been making caustic remarks again! (IMG:style_emoticons/default/laugh.gif) Many apologies for replying when I don't have an answer - but what experiment is it you need to do? Could you use domestic vinegar instead? Vitriolic remarks would be more likely ! (vitriol is another name for sulfuric acid whereas caustic refers to sodium hydroxide). Yes, I know. You'd need the vitriol to neutralise the caustic, surely? (IMG:style_emoticons/default/wink.gif) |
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| YetAnotherPianist |
Jan 6 2007, 12:58 AM
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#15
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Virtuoso Group: Members Posts: 6692 Joined: 18-January 05 From: Sofa; occasionally, piano stool Member No.: 2978 |
QUOTE(anacrusis @ Jan 6 2007, 12:49 AM) Yes, I know. You'd need the vitriol to neutralise the caustic, surely? (IMG:style_emoticons/default/wink.gif) So long as that doesn't mean someone gets a-salt-ed (IMG:style_emoticons/default/wink.gif). |
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