the-following-results-are-obtained-when-an-aqueous-solution-of-cation-green-sphe

Question

The following results are obtained when an aqueous solution of cation (green spheres) and anion (orange spheres) is mixed:

Which of the following pairs of cation and anion are consistent with what has been observed? Explain

Cations: K⁺, Cu⁺, Pb²⁺, Co³⁺

Anions: NO₃⁻, Cl⁻, S^2–, AsO₄^3⁻

Accepted Answer

The pair of cation and anion consistent with the observation is Cu₂S because it is insoluble in water.

Answer

The pair of cation and anion consistent with the observation is K₂S because it is soluble in water.

Answer

The pair of cation and anion consistent with the observation is PbS because it is insoluble in water.

Answer

The pair of cation and anion consistent with the observation is CoAsO₄ because it is insoluble in water.

Answer

The pair of cation and anion consistent with the observation is Co₂S₃ because it is insoluble in water.