( vietnamese ) cân 5.219 (g) m?u th?c ph?m, kh? nhi?m và ??nh m?c ??n 100ml (dung d?ch 1). rút 10ml ?? xác ??nh ?? m?n b?ng ph??ng pháp volhard. th? tích dung d?ch agno3 0,05n ?ã dùng là 25ml, th? tích dung d?ch kscn 0,05n ?em chu?n ?? v?i l??ng d? agno3 thành 12,19 ml. tính ?? m?n thành% nacl trong m?u ban ??u và n?ng ?? (mg / l) c?a nacl trong dung d?ch 1 ( english ) weigh 5,219 (g) food samples, decontaminate and make up to 100ml (solution 1). withdraw 10ml to determine salinity by volhard method. the volume of 0.05n agno3 solution used is 25ml, the volume of 0.05n kscn solution is titrated with the excess agno3 to 12.19 ml. calculate the salinity to %nacl in the original sample and the concentration (mg/l) of nacl in solution 1 Get the answer
Category: computerinformation | Author: Mona Eva