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11 Dec 2019
A student was given a solid containing a mixture of nitrate salts. The sample completely dissolved in water, and upon addition of dilute HCl, no precipitate formed. The pH was lowered to about 1 and H2S was bubbled through the solution. No precipitate formed. The pH was adjusted to 8 and H2S was again bubbled in. This time, a precipitate formed. Which compounds might have been present in the unknown?
Sn(NO3)4
Ca(NO3)2
Co(NO3)2
KNO3
Pb(NO3)2
Cd(NO3)2
Mn(NO3)2
Cr(NO3)3
A student was given a solid containing a mixture of nitrate salts. The sample completely dissolved in water, and upon addition of dilute HCl, no precipitate formed. The pH was lowered to about 1 and H2S was bubbled through the solution. No precipitate formed. The pH was adjusted to 8 and H2S was again bubbled in. This time, a precipitate formed. Which compounds might have been present in the unknown?
Sn(NO3)4
Ca(NO3)2
Co(NO3)2
KNO3
Pb(NO3)2
Cd(NO3)2
Mn(NO3)2
Cr(NO3)3
Casey DurganLv2
13 Dec 2019