Print Calculator Periadic Table Question 3 of 5 Map sapling learning student was

Question

Print Calculator Periadic Table Question 3 of 5 Map sapling learning 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? Pb(NO3)2 KNO3 Zn(NO3)2 Cu(NO3)2 Al(NO3)3 AgNO3 Ca(NO3)2 Mn(NO3)2 Previous Give Up & View Solution O Check Answer Next Exit Hint

Explanation / Answer

Discard: PB, Ag, since they will form Cl- precipitates in the beggining

Discard: Cu, sine it should have precipitated in H2S as CuS

NOTE: KNO3 will not precipitate K never, since it is IA element.. therefore, KNO3 may be present

Zn may precipitate as Zn(OH)2, it might be here

Al may precipitate as Al(OH)3, it might be in solution

Ca may precipitate as Ca(OH)2, it might be here

Mn(NO3)2 may form also Mn(OH)2, so it also may be here

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.