Chemical Forums

Chemistry Forums for Students => High School Chemistry Forum => Chemistry Olympiad and other competitions => Topic started by: osiris2354 on May 24, 2006, 08:20:36 PM

Title: Need Help with Laboratory Practical
Post by: osiris2354 on May 24, 2006, 08:20:36 PM

I have found a problem from an old National Chemistry Olympiad and have been stumped by it. It is Lab Problem 2 at http://acswebcontent.acs.org/education/olympiad/2003/natl_03_part3.pdf. I was hoping somebody could shed some light on how to do this. I know it does have an example on the site but I'm not sure if it is just an example and it doesn't work or if it does and I was also wondering if there were other ways to do it.

Title: Re: Need Help with Laboratory Practical
Post by: syko sykes on May 24, 2006, 09:06:53 PM

i think i would try to use phen and AgNO₃... phen will indicate acid or base for you and AgNO₃ will form different precipitates with certain reactants to help you indicate which ones they are

Title: Re: Need Help with Laboratory Practical
Post by: osiris2354 on May 24, 2006, 10:42:27 PM

Do you think the example would work?

Title: Re: Need Help with Laboratory Practical
Post by: xiankai on May 25, 2006, 07:51:21 AM

which of the reagents are in solid/aqueous form at start?