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nttlinh26052001
2 năm trước
Trộn 200ml dd H2SO4 nồng độ xM ( dd C) với 300ml dd KOH nồng độ yM (dd D) , thu được 500ml dd E làm quỳ tím chuyển màu xanh. Để trung hoà 100ml dd E cần dùng 40ml dd H2SO4 1M . Mặt khác, trộn 300ml dd C với 200ml dd D thì thu được 500ml dd F. Biết rằng 100ml dd F phản ứng vừa đủ với 2,04g Al2O3. Tính x,y
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