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4 July, 12:20

An aqueous solution contains the following ions: Cl-, K+, Mg{2+}, NO3{-}, SO4{2-}. Is a precipitate likely to form? If so, giv ethe formula of the precipitate.

A. MgSO4

B. MgCl2

C. K2SO4

D. No precipitate will form.

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  1. 4 July, 13:07
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    D. No precipitate will form.

    You must recall the pertinent solubility rules:

    Salts of Group 1 elements (K⁺) are soluble. Salts containing nitrate ion (NO₃⁻) are soluble. Salts containing chloride ion (Cl⁻) are generally soluble. Most sulfate (SO₄²⁻) salts are soluble.

    The only ion not included in the list is Mg²⁺.

    However, according to the rules, Mg (NO₃) ₂, MgCl₂, and MgSO₄ are soluble.

    Thus, there is no precipitate.
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