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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: priyoX on October 12, 2016, 12:59:26 PM

Title: Why does ZnS doped Ag turn yellow?
Post by: priyoX on October 12, 2016, 12:59:26 PM

I've been trying to pour a 20ml 0.4M solution of SIlver nitrate into a zinc nitrate solution, but its turning yellowish brown instantly. Why would this happen? I've even changed bottles to prevent contamination, but its still yellowing out?

Title: Re: Why does ZnS doped Ag turn yellow?
Post by: Mitch on October 12, 2016, 05:05:19 PM

Is something precipitating out?

Title: Re: Why does ZnS doped Ag turn yellow?
Post by: Arkcon on October 12, 2016, 08:42:56 PM

Photoreaction?

Title: Re: Why does ZnS doped Ag turn yellow?
Post by: mjc123 on October 13, 2016, 04:27:24 AM

Zinc nitrate or zinc sulfide?

Title: Re: Why does ZnS doped Ag turn yellow?
Post by: jasongnome on October 14, 2016, 02:04:10 AM

Zinc sulfide is insoluble, so it can't be a solution of that.

A yellowish brown colour in nitrates usually occurs when nitrogen oxides are formed.

Is the yellowish brown colour clear, or is it a precipitate?