Traditional Culture Encyclopedia - Photography and portraiture - The double salt M [K3Fe (A2B4) 3 3H2O] can be used for photography and blue printing. A group of students added pure compound M under certain conditions.
The double salt M [K3Fe (A2B4) 3 3H2O] can be used for photography and blue printing. A group of students added pure compound M under certain conditions.
( 1) ? ; 2C(s)+O 2 (g)===2CO(g)？ △H=-22 1.2？ kJ mol - 1
(2) Flame coloring method
(3) the sample changes from colorless to light red, and the sample will not change color within half a minute after shaking;
(4)2? k3fe(c2o 4)3·3H 2 O = = = 3K 2co 3+Fe+FeO+5CO 2+4CO+6H 2 O； 0.8N A
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