Pre-laboratory Questions 1. A solution is saturated with H,S at a concentration

Question

Pre-laboratory Questions 1. A solution is saturated with H,S at a concentration of 0.10 M and is 0.00020 M in each of the metal cations Co, Fe Mn', Ni 2, and Zn"2. At a pH of 3.0, which of the metal cations will precipitate as the su lfide? (HINT: Calculate IP) Metal Sulfide ZnS CoS Nis FeS MnS 3×10-2 5×10-1 4 × 10, 6× 102 3 × 10' 2. Under the conditions given in the preceding question, what pH is needed to pre- cipitate as much of the Zn ,Co2, and Ni 2 as possible without precipitating the Fe*2 and Mn?

Explanation / Answer

1)

Answser:

The compound which has lower Ksp will form the precipitate first.

in the above table ZnS has lowest Ksp ,so it precipitate first.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

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