Hoffman"s Apparatus

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mtg
Posts: 510
Joined: 15 Aug 2011, 10:48
Job Title: Lab Tech
School: NDSC
Suburb: west gippsland
State/Location: VIC

Hoffman"s Apparatus

Post by mtg »

YAY!!! I have just replaced my old leaky carbon rods in old stoppers in the old Hoffman's Apparatus with Westlab's silicone UNI-Stop ones. So far so good, haven't had time to check it but have the prac later today. Fingers crossed.
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Labbie
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Joined: 28 Nov 2006, 10:00
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Re: Hoffman"s Apparatus

Post by Labbie »

Do let us know how it goes.
Regards Labbie

Lab Manager/Lab Tech, mind reading etc etc
Now retired :wub:
mtg
Posts: 510
Joined: 15 Aug 2011, 10:48
Job Title: Lab Tech
School: NDSC
Suburb: west gippsland
State/Location: VIC

Re: Hoffman"s Apparatus

Post by mtg »

It is blitzing! It is the green stoppers with fat carbon electrodes and 5% NaCl on 8 Volt DC. We are yet to test the gases and we are unsure if the NaCl is too strong and we have Cl, instead of H2 and O2. You need only very dilute NaCl soln.
bigmack
Posts: 816
Joined: 15 Dec 2015, 10:49
Job Title: Lab Technician
School: FCAC
State/Location: QLD

Re: Hoffman"s Apparatus

Post by bigmack »

Interesting , we have always used Sulfuric acid . Good to know the carbon electrodes work . We just got some replacement electrodes with the Platinum foil type …….bloody expensive .
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