Please explain 2. An aqueous solution of calcium chloride is allowed to react wi

Question

Please explain 2. An aqueous solution of calcium chloride is allowed to react with an aqueous solution of potassium sulfate. One of the spectator ions in the complete ionic equation is (with correct coefficient) A) 2so42 (aq) B) K (aq) C Ca (aq) D) 2C1 (aa) E) P (aq) An aqueous solution of calcium chloride is allowed to react with an aqueous solution of potassium sulfate. The complete ionic equation contains which of the following species (with correct coefficient A) 2SO4 (aq) B) 2 (aq) C) Ca (aq) D) Cl (aq) E) P (ag)

Explanation / Answer

Pretty much all salts of potassium are soluble
so it definitely cannot be K2SO4 or KCl
CaSO4 is however insoluble
so:

complete ionic equation
2K(aq)+1 + SO4(aq)-2+ Ca+2(aq) + 2Cl-1(aq) = CaSO4(s) + 2K(aq)+1 + 2Cl-1(aq)

net ionic (drop the spectator ions)
SO4(aq)-2+ Ca+2(aq) = CaSO4(s)

question 1

option D is the answer 2Cl-

question 2

option B is the correct answer 2K+

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