Help please - High conc. CuSO4 / Cu(NO3)2 solutions

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kazuki
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Joined: 13 Mar 2024, 08:24
Job Title: Laboratory Technician
School: High School
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Help please - High conc. CuSO4 / Cu(NO3)2 solutions

Post by kazuki »

Hello everyone! I would appreciate some advice with the following please :-( :

This is for a "constructing a galvanic cell" prac. I got a request for 5M CuSO4 or 5M Cu(NO3)2 solution. From research and trial & error, I know that the solutions eventually become supersaturated where crystallization subsequently occurs. From your guys' experience, what're the most concentrated copper solutions able to be made without any crystals or solid chunks forming? Sorry, this sounds like such a simple topic but I couldn't seem to find an answer. Thanks everyone! :D
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ELIZABETH
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Re: Help please - High conc. CuSO4 / Cu(NO3)2 solutions

Post by ELIZABETH »

I'm not sure you can make a 5M CuSO4....according to the bible (ie. The Laboratory) a saturated solution of CuSO4 is 22.3 g in 100 mL which is pretty close to 1M I think????
bigmack
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Re: Help please - High conc. CuSO4 / Cu(NO3)2 solutions

Post by bigmack »

I agree with Elizabeth .
I have never been asked for anything higher than 0.5 - 1mol/l for galvanic cell pracs .

I wonder if teacher has given you a typo
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Anna Z
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Re: Help please - High conc. CuSO4 / Cu(NO3)2 solutions

Post by Anna Z »

We use 1M for the Gal cell prac, works a treat, any lower and sometimes it's hard to see a change unless using digital multimeters.
kazuki
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Joined: 13 Mar 2024, 08:24
Job Title: Laboratory Technician
School: High School
State/Location: QLD

Re: Help please - High conc. CuSO4 / Cu(NO3)2 solutions

Post by kazuki »

Thanks for all of your help. Appreciate it. <3
Marama T
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Re: Help please - High conc. CuSO4 / Cu(NO3)2 solutions

Post by Marama T »

What did you end up using?
kazuki
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Joined: 13 Mar 2024, 08:24
Job Title: Laboratory Technician
School: High School
State/Location: QLD

Re: Help please - High conc. CuSO4 / Cu(NO3)2 solutions

Post by kazuki »

Marama T wrote: 20 Mar 2024, 11:50 What did you end up using?
Sorry for the late reply.
I ended up making max. 2M solution for the group of students who made the request. :)
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