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Cho khoảng một thìa cafe bột NaHCO3 vào bình tam giác, sau đó thêm vào bình 10 mL dung dịch CH3COOH. Chạm tay vào thành bình ta thấy bình lạnh đi, đây là phản ứng:
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Cho dung dịch CH3COOH 0,1M. Hằng số phần li của acetic acid bằng 1,75.10-5.
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