Chemistry, 01.08.2021 14:00, court3138

hàm lượng NaCl có trong nước mắm được xác định bằng phương pháp Morh như sau: lấy chính xác 3ml mẫu, pha loãng bằng nước cất, rồi định mức thành 100ml. hút 20ml dd này cho vào 3 giọt K2CrO4 5% làm chỉ thị, rồi đem chuẩn độ bằng AgNO3 0,055N thì hết 9,5ml. viết các phản ứng xảy ra. tính hàm lượng(g/l) NaCl trong nước mắm. Ag=108,Cl=35,5;N=14,O=16

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hàm lượng NaCl có trong nước mắm được xác định bằng phương pháp Morh như sau: lấy chính xác 3ml mẫu,...