The table shown gives the solubility product constant (Ksp) for a few salts of mercury. ?

From the table, which saturated solution has the greatest value for [Hg+]?

Salt        Ksp

Hg2Br2  6 × 10–23

Hg2F2   3.1 × 10–6

Hg2Cl2  1 × 10–18

Hg2I2     5 × 10–29

2 Answers

  • 1 month ago

    This is actually a poorly-worded question. The technically correct answer would be none of them. In a solution involving mercury(I), the correct cation in solution is Hg2^2+, not Hg^+.

  • 1 month ago

    All of the four salts have the same formula type, i.e. A₂B₂. Hence, their solubility can be directly compared by means of Ksp. The greater the Ksp, the higher the solubility is and thus a high [Hg⁺].

    Hg₂F₂ has the greater value for Ksp. Hence, the saturated solution of Hg₂F₂ has the greater value for [Hg⁺].

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