precipitation prac
Posted: 21 Apr 2008, 09:11
Hi all,
I'm having some trouble getting a precipitation prac to work and was wondering whether anyone had any ideas (my background is more human biology than chemistry).
They are doing a prac where they react Silver nitrate, lead nitrate and magnesium nitrate with potassium nitrate, chloride, iodide, sulphate and carbonate. I get all the right reactions occurring with everything but the silver nitrate with the potassium sulphate (should form a precipitate).
I'm told that prior my being here it worked with 0.1M solutions of each. I've tried making up fresh solutions of each and using a more conc (0.5M and 1M) solution of potassium sulphate but I get nothing. I'm hesitant to try increasing the strength of the silver nitrate as 1: we've never had it made up to anything stronger so I'm sure it should work and 2: it's so expensive.
I'm sure I'm probably just missing something really simple but at the moment I'm stumped so if anyone has any ideas I would be very appreciative.
I'm having some trouble getting a precipitation prac to work and was wondering whether anyone had any ideas (my background is more human biology than chemistry).
They are doing a prac where they react Silver nitrate, lead nitrate and magnesium nitrate with potassium nitrate, chloride, iodide, sulphate and carbonate. I get all the right reactions occurring with everything but the silver nitrate with the potassium sulphate (should form a precipitate).
I'm told that prior my being here it worked with 0.1M solutions of each. I've tried making up fresh solutions of each and using a more conc (0.5M and 1M) solution of potassium sulphate but I get nothing. I'm hesitant to try increasing the strength of the silver nitrate as 1: we've never had it made up to anything stronger so I'm sure it should work and 2: it's so expensive.
I'm sure I'm probably just missing something really simple but at the moment I'm stumped so if anyone has any ideas I would be very appreciative.