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kimmtae127
2 năm trước
Dung dịch X có chứa 4 ion: Mg2+, Ca2+; 0,1 mol Cl- và 0,2 mol NO3-. Thêm từ từ V lít dd Na2CO3 2 M vào X đến khi được lượng kết tủa lớn nhất. Giá trị của V ít nhất cần dùng là A. 75ml B. 225ml C. 100ml D. 150ml Giải chi tiết giúp em ạ, thanks:>
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