Chemistry, 09.08.2021 20:40 b00n4l1f3

lấy 20 giọt dung dịch na2s2o3 1%. lấy vào ống khác 10 giọt na2s2o3 1% và 10 giọt nước cất. cùng một lúc nhỏ vào hai ống , mỗi ống một giọt h2so4 2N. lắc đều và nhận xét xem ống nào đục trước

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lấy 20 giọt dung dịch na2s2o3 1%. lấy vào ống khác 10 giọt na2s2o3 1% và 10 giọt nước cất. cùng một...

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