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已知某固体混合物A中含有CuSO₄、FeCl₃、NaNO₃、BaCl₂、CaCO₃，五种物质中的两种或多种按下述步骤进行实验探究，观察实粒现象，并加以分析推理（设过程中所有发生的反应都恰好完全反应）

Ⅰ．取一定质量的该固体混合物A放入一洁净烧杯中，向其中加入适量NaOH溶液、搅拌，待烧杯中物质充分反应后，过滤，得到褐色沉淀B和滤液C

Ⅱ．另取一定质量的该固体混合物A放入另一结晶烧杯中，向其中加入适量H₂SO₄溶液、搅拌，待烧杯中物质充分反应后，过滤，得到白色沉淀D和滤液E

Ⅲ．将所得溶液C和溶液E充分混合，再向混合后的溶液中加入适量AgNO₃溶液，待充分反应后，过滤，得白色沉淀F和滤液G

Ⅳ．根据上述实验过程和发生的现象做出相应的推理，填写以下空白：