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tientaithd
2 năm trước
Hòa tan hết 7,18 gam NaCl vào 20 gam nước ở 20°C được dung dịch bão hòa. Xác định độ tan của NaCl ở nhiệt độ đó. a) Viết PT phản ứng xảy ra và tính nồng độ mol/lít của dd A. b) Tính thể tích dd H2SO4 20% (d=1,14g/ml) cần để trung hòa dd A c) Tính nống độ mol/lít của dd thu được sau khi trung hòa
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