... pHH2O 3,80 8, 12 5,13 pHKCl 3 ,20 7 ,24 4,18 pH 0,30 2, 00 0,94 pHH2O 4,11 7,57 5,47 pHKCl 3,57 6,84 4,59 pH 0 ,28 1,80 0,89 pHH2O 3,84 8, 02 5,11 pHKCl 3,60 7,66 4 ,29 pH 0,01 1, 32 0,89 pHH2O ... 08: 20 09/BTNMT, H Ni B Y t (20 02) , Tiờu chun v sinh nc n ung - 1 329 /20 02/ BYT/Qé, H Ni B Y t (20 09), Qui chun k thut quc gia v cht lng nc sinh hot - QCVN 02: 20 09/BYT, H Ni Hach Company (20 02) , ... mui Mo ( cụng thc (NH4)2Fe(SO4 )2) Cn c vo lng kali bicromat tiờu tn, tớnh giỏ tr COD Phn ng gia mui Mo v bicromat nh sau: 6Fe2+ + Cr2O 72- + 14H+ 6Fe3+ + 2Cr3+ + 7H2O 1 .2. 2 Phng phỏp s 8000 ca...