台大95普化B的第18題，94普化A的第7題
Given that a saturated NaCl solution has a concentration of 5.4 M, which
of the following condition will cause NaCl to crystalize?
[NaCl molar mass=58.5, NaNO3 mass molar=85.00]
A. Addition of 1 M NaNo3 solution to 5.4 M NaCl solution.
B. Addition of 10 g of NaCl crystals to 100 ml of 3 M NaCl solution.
C. Addition of 6 M NaNo3 solution to saturated NaCl solution.
D. Addition of 1.0 g of NaNO3 crystals to 10.0 ml of 4.4 M NaCl solution.
答案似乎是C的樣子，但我實在是不知道該如何下手
是不是該從題目推Ksp=(5.4)^2，然後設Cl陰離子為限量試劑完全沈澱再右移平衡？
但這樣的話，A應該也會沈澱才是吧？
還請高手指點一下，謝謝
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