https://padlet.com/phamhoaibao/r6i0vvydn057xwjw Bắp cải tím là một nguyên liệu rất phổ biến và dễ kiếm trong cuộc sống. Sắc tố chính được chiết xuất từ lá cải tím là cyanidin 3,5-diglucoside của hệ màu anthocyanin (màu tím) và có màu sắc thay đổi rõ rệt theo pH của môi trường cần xác định. Trong môi trường acid nó có màu đỏ bền, trong môi trường base nó chuyển sang màu xanh và bền trong thời gian dài. Sử dụng nước bắp cải tím dùng để nhận biết dung dịch acid, dung dịch base của các chất, nhận biết được môi trường đất theo phương pháp đơn giản, giúp lựa chọn cây trồng sao cho phù hợp. Bên cạnh đó, chế tạo giấy quỳ giúp HS nhận biết được môi trường các chất, giúp người nông dân nhận biết môi trường đất một cách đơn giản. en-us 2023-09-24 14:42:45 UTC 2025-09-27 07:58:37 UTC hello@padlet.com https://padlet-uploads.storage.googleapis.com/1461361597/47e5726bb934b75231eea7c7995890e6/11896529_854275534642786_3161410851626629630_o.jpg phamhoaibao https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2717942681 2023-09-24 15:05:44 UTC https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2717942681 phamhoaibao https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2717946640 2023-09-24 15:10:50 UTC https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2717946640 phamhoaibao https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2717947461 2023-09-24 15:11:46 UTC https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2717947461 phamhoaibao https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2717951494 2023-09-24 15:16:42 UTC 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https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718014551 phamhoaibao https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718014784 2023-09-24 16:32:17 UTC https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718014784 phamhoaibao https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718027883 2023-09-24 16:48:52 UTC https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718027883 phamhoaibao https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718044930 2023-09-24 17:09:20 UTC https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718044930 phamhoaibao https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718046829 2023-09-24 17:11:47 UTC https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718046829 phamhoaibao https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718049108 2023-09-24 17:14:29 UTC https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718049108 https://padlet.com/phamhoaibao/r6i0vvydn057xwjw/wish/2718850668 Bnguyen A2 vs quân]]> 2023-09-25 07:24:50 UTC 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