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nguyenhuuke230407
2 năm trước
Câu 25: Có hai thanh kim loại X, mỗi thanh có khối lượng bằng nhau là a gam. - Thanh thứ 1 cho tác dụng với 100 ml dd AgNO3 ta thu dd A. - Thanh thứ 2 cho tác dụng với 1,51 lít dd Cu(NO3)2 ta thu dd B. - Sau một thời gian lấy 2 thanh kim loại ra khỏi dd và sấy khô thấy khối lượng thanh thứ 1 tăng và thanh thứ 2 giảm nhưng tổng khối lượng 2 thanh vẫn là 2a gam và nồng độ mol muối nitrat của kim loại X trong dd B gấp 10 lần trong dd A. Tìm X (biết X có hóa trị II)?
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