ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: Galvanic Cell on October 16, 2010, 10:29:39 pm

Title: Text Book Question Help
Post by: Galvanic Cell on October 16, 2010, 10:29:39 pm
Could someone please explain to me why you could store 1.0 M Fe2(SO4)3 solution in a container made of Ni metal safely?
Thanks :)
Title: Re: Text Book Question Help
Post by: Studyinghard on October 16, 2010, 10:53:38 pm
The Fe ions wont react with Ni metal because its not a spontaneous reaction.
Title: Re: Text Book Question Help
Post by: Galvanic Cell on October 16, 2010, 11:05:43 pm
But Fe3+ has a greater Eo value so shouldnt it be spontaneous?
Title: Re: Text Book Question Help
Post by: Studyinghard on October 16, 2010, 11:24:24 pm
oh right, my bad. looked like Fe2+ at a quick glance. I have no idea now :P
Title: Re: Text Book Question Help
Post by: sajib_mostofa on October 16, 2010, 11:37:17 pm
Maybe the rate of reaction is too slow? After all, the electrochemical series doesn't tell us that info...
Title: Re: Text Book Question Help
Post by: chansthename on October 18, 2010, 04:39:37 pm
Quote from: sajib_mostofa on October 16, 2010, 11:37:17 pm
Maybe the rate of reaction is too slow? After all, the electrochemical series doesn't tell us that info...

even if it is slow it would still not be a good idea because we are storing it (eventually it would not be 1.0M anymore making it useless)

perhaps a mistake by the exam writer (they may have meant fe2+)