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niin3112
2 năm trước
1. Htan 15.5 Na2O vào nước tạo thành 0.5 lít dung dịch a) Tính nồng độ mol dung dịch thu đc b)Tính thể tích dung dịch H2SO4 20% cần để dung hòa dung dịch trên c)Tính nồng độ mol dung dịch sau phản ứng 2. Để dung dịch hòa 1 dung dịch chứa 189g HNO3, đầu tiên người ta dùng dung dịch 112g KaOH . Sau đó người ta lại đổ thêm dung dịch Ba(OH)2 25% cho dung hòa hết axit a) Viết PT b) Tính klg dung dịch BAPH đã dùng MINH ĐANG CẦN GẤP
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