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thanhngoc349
2 năm trước
Cần lấy bao nhiêu gam nước và bao nhiêu gam tinh thể hidrat có công thức AB.8H2O với khối lượng mol là 364 gam để pha một dung dịch bão hòa ở 90oC mà khi làm lạnh đến 40oC sẽ lắng xuống 0,25 mol tinh thể hidart có công thức AB.8H2O. Cho biết S của muối khan AB ở 90oC là 90 gam và 40oC là 60 gam.
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