I have the answer to this question, but I just want to make sure I am thinking t
ID: 546179 • Letter: I
Question
I have the answer to this question, but I just want to make sure I am thinking through it properly.
(Given) Based on the solubility rules, which of these processes will occur if solutions of ZnSO4(aq) and MgCl2(aq) are mixed?
(Not given is the actual chemical reaction- am I supposed to be able to write the equation? or just understand solubility rules to be able to recognize which compounds are soluble.)
a. ZnCl2 will precipitate; Mg2+ and SO42- will be spectator ions
b. ZnSO4 will precipitate; Mg2+ and Cl- will be spectator ions
c. MgSO4 will precipitate; Zn2+ and Cl- will be spectator ions
d. MgCl2 will precipitate; Zn2+ and SO42- will be spectator ions
e. No precipitate will form
* Initially I thought the answer was A.
But I looked closer and looked at my notes and see that sulfates (xSO4) and chlorides (xCl2) are both soluble. So I think E is the right answer.
I think the answer is E because all we know -or are given- is that we have two solutions that have soluble salts in them. I am not told that heat was added, or how the chemicals are being mixed. All I know- from the question- is that two soluble solutions are mixing and I can depend on my solubility 'rules' or trends.
Let me know if I am thinking through this properly, for the question given.
Is there another solubility rule I am missing? Is my reasoning for choosing E incomplete?
Explanation / Answer
You are right!
Both Magnesium chloride and zinc sulphate are highly water soluble. If you mix them no precipitation will occur. so the answer is (e).