Suppose you have a solution that might contain any or all of thefollowing cation

Question

Suppose you have a solution that might contain any or all of thefollowing cations: Cu2+, Ag+,Ba2+, and Mn2+. Addition of HCl causes aprecipitate to form. After the precipitate is filtered off, H2SO4is added to the supernate and another precipitate forms. Thisprecipitate is filtered off, and a solution of NaOH is added to thesupernatant liquid until it is strongly alkaline. No precipitate isformed. Which ions are present in each of the precipitates? Whichcations are not present in the original solution?

Explanation / Answer

Add HCl: if there is precipitate=> Ag+ is present Ag+ + Cl- --> AgCl(s) Add H2SO4=> Ba2+ is present Ba2+ + SO42- -->BaSO4(s) If Mn2+ and Cu2+ are in solution, when addNaOH, it will react to form Cu(OH)2 andMn(OH)2 since there is none=> Cu2+ and Mn2+ arenot present.

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

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