sodium sulfide and copper(II) nitrate
Adding colorless sodium sulfide to blue copper(II) nitrate produces a black precipitate.
Solution A: 0.1 M sodium sulfide (colorless)
Solution B: 0.2 M copper(II) nitrate (blue)
Precipitate: (black)
Cu(NO3)2(aq) + Na2S(aq) --> CuS(s) + 2 NaNO3(aq)
The file name of this movie is S1052.MOV and is located in the directory/folder named MOVIES/PRECIPR.
If your browser has not brought the movie into the above space (you might be running a version of Netscape earlier than 3.0 or not have the proper plug-in), clicking on the following will possibly access the movie. Play movie.
© 1997 Division of Chemical Education, Inc., American Chemical Society. All rights reserved.