Back Titration Ideas

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MariaQ
Posts: 84
Joined: 02 Sep 2015, 08:41
Job Title: Boss
School: Central Coast Grammar
State/Location: NSW

Back Titration Ideas

Post by MariaQ »

Hi All,

My teachers are looking at doing a back titration, any tried and tested methods out there you are willing to share?? :giggle:
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melsid
Posts: 355
Joined: 07 Apr 2013, 07:11
Job Title: Lab Rat
School: PHS
State/Location: NSW

Re: Back Titration Ideas

Post by melsid »

I might be able to help if i knew what a back titration was??? Showing my lack of knowledge here...
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Labbie
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Re: Back Titration Ideas

Post by Labbie »

I was going to ask the same question Melsid
Regards Labbie

Lab Manager/Lab Tech, mind reading etc etc
Now retired :wub:
MariaQ
Posts: 84
Joined: 02 Sep 2015, 08:41
Job Title: Boss
School: Central Coast Grammar
State/Location: NSW

Re: Back Titration Ideas

Post by MariaQ »

Hi Guys,

Its where you cant titrate one substance directly against another, so you react A with B in excess and then titrate residual B against C and calculate the amount of A by working out how much of B was used in the first reaction! :cheesy: Hope that makes sense!
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Labbie
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Re: Back Titration Ideas

Post by Labbie »

Will thank you MariaQ yes it does make sense.
Regards Labbie

Lab Manager/Lab Tech, mind reading etc etc
Now retired :wub:
curie
Posts: 360
Joined: 27 May 2010, 09:42
State/Location: NSW

Re: Back Titration Ideas

Post by curie »

Ooo, I haven't done one of those in 20 years!
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melsid
Posts: 355
Joined: 07 Apr 2013, 07:11
Job Title: Lab Rat
School: PHS
State/Location: NSW

Re: Back Titration Ideas

Post by melsid »

Wow, that sounds like fun!!!
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kimmy
Posts: 418
Joined: 01 Jun 2006, 10:00
Job Title: School Lab Assistant
School: Quirindi High School
Suburb: Quirindi
State/Location: NSW

Re: Back Titration Ideas

Post by kimmy »

we use 0.1m Sodium Hydroxide and 0.1M Hydrochloric acid and phenolphthalein indicator. :thumbup:
MariaQ
Posts: 84
Joined: 02 Sep 2015, 08:41
Job Title: Boss
School: Central Coast Grammar
State/Location: NSW

Re: Back Titration Ideas

Post by MariaQ »

Hi Kimmy, from my understanding, thats just a straight forward titration, not a back titration. Cheers M
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nickykinz
Posts: 271
Joined: 02 Feb 2009, 12:53
Job Title: Lab Assistant
School: St Augustine's College
Suburb: Augustine Heights
State/Location: QLD

Re: Back Titration Ideas

Post by nickykinz »

We do "Determining the purity of a sample of calcium carbonate". You put the accurately weighed carbonate in excess HCl then titrate the remaining HCl with NaOH. I can try and scan it for you if you want.
Nicky
;)
St Augustine's College
Augustine Heights, QLD 4300
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