... 12 12 n - - - 4 74% 74% S hc C S hc - - T S hc - - O P (%) VD 52% Po, 68% KLK, Ba, Fe, Au, Ag, Cu, Ni, Be, Mg, Zn, Tl, Cr, Ti b Cu trỳc mng tinh th ca hp kim Nh ó bit, hp kim l vt liu kim loi ... hay, ngn gn ) - 18 - - Mc lm rừ ni dung ch yu phi t c ca ton bi kim tra - Thi gian hon thnh bi kim tra - Mc say mờ i vi mụn hc d Mt s bin phỏp bi dng hc sinh gii hoỏ hc trng THPT - Kớch thớch ... Al(OH)3 - 45 - + ( E0Cr2+/Cr = -0 ,91 V E0Cr3+/Cr = -0 ,74 V ) 60 0-8 000C Cr + H2O Cr2O3 + H2 D, C *Lm dựng, dõy *Ch to hp kim ( gang, *Ch to hp kim ( cng, in, xõy dng, ch thộp ) to hp kim, cht...