NS FL3 C/P #51

Post Reply
NS_Tutor_Will
Posts: 126
Joined: Fri May 25, 2018 9:15 am

NS FL3 C/P #51

Post by NS_Tutor_Will » Sat Aug 25, 2018 9:05 am

A student recently asked, "Was there a mistake in option A? It says the Ksp for silver sulfate is much larger than the Ksp for the yellow percipitate, however, the yellow percipitate IS silver sulfate!"

In paragraph two of this passage, we are told that mass spectrometry performed on the yellow precipitate showed two absorption peaks which correlated with a phosphate group and silver. Thus, the yellow precipitate must be silver phosphate (Ag3PO4).

The Ksp of silver sulfate is much larger than the Ksp of silver phosphate, so we wouldn't expect silver sulfate to precipitate.

I hope this helps!
Post Reply