K
kosoai_dva2


FeS+H2SO4-->Fe2(SO4)3+SO2+H2O
FES2+H2S04-->FE2(SO4)3+SO2+H2O
CU+Hcl+NaNo3-->CU(NO3)2+NO+NACL+H2O
giup gium nha cam on truoc











FES2+H2S04-->FE2(SO4)3+SO2+H2O
CU+Hcl+NaNo3-->CU(NO3)2+NO+NACL+H2O
giup gium nha cam on truoc