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Anonymous users2024-02-07Black, ferrous oxide, manganese dioxide, ferric tetroxide.
White, ferrous hydroxide, calcium carbonate, barium carbonate, barium sulfate, barium hydroxide, reddish-brown, ferric oxide, nitrogen dioxide.
Those with ferric ions are generally reddish-brown.
Bivalent iron is white.
Copper ions are blue.
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Anonymous users2024-02-06Potassium permanganate (solid) violet-black (liquid) fuchsia.
Chlorine is pale yellow.
You can list it yourself in the textbook.
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Anonymous users2024-02-05CUS black: blue with low copper ion concentration and green with high concentration.
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Anonymous users2024-02-041) The color of the substance:
Colored gas element: F2 (light green), Cl2 (yellow-green).
Other colored elements: BR2 (dark brown-red liquid), I2 (purple-black solid), S (light yellow solid), CU (red solid), AU (golden yellow solid), P (white phosphorus is a white solid, red phosphorus is a reddish solid), Si (gray-black crystal), C (black powder).
Colorless gas elemental: N2, O2, H2 Non-ferrous gas compound: NO2 (red-brown).
Yellow solids: S, Na2O2, AGBR, AGi, FeS2
Black solids: FeO, Fe3O4, Mno2, C, Cus, PBS, Cuo
Red solids: Fe(OH)3, Fe2O3, Cu2O, Cu
Blue solid: copper sulfate pentahydrate (bile alum or blue alum);
Green solids: ferrous sulfate heptahydrate (alum);
Purple-black solid: KMNO4, iodine element.
White [Fe(0H)2, CaCO3, BaSO4, AGCL, BaSO3].
Gray: Fe(Oh)2 becomes grayish-green, an intermediate product of Fe(Oh)3.
Brown: CuCl2 crystals brownish-yellow; FeCl3 solution solution is brownish-yellow.
Colored ions (solution) Cu2+ (blue), Fe2+ (light green), Fe3+ (yellow), MnO4 (purple-red).
White precipitates insoluble in dilute acids: AGCL, BaSO4 Yellow precipitates insoluble in dilute acids: S, AGBR, AGI
fe(scn)]2 + red (or blood red); Oxidized phenol (i.e., benzoquinone) pink; Litmus is blue in a solution of pH8;
Orange: Bromine orange; Bromine is soluble in organic solvents, orange or orange-red;
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Anonymous users2024-02-03There are too many, don't list them, flip through the book yourself, and you can ask any difficult questions.
1.The color of the important ions.
Cu2+: blue, such as a solution of copper salts: Cu(NO3)2, CuCl2, CuSO4. >>>More
Actually, what you mean is that you may not be able to tell which is on top and what is on the bottom in extraction >>>More
In this reaction, there is only the electron gain and loss of nitrogen element, the valency has risen and decreased, so C is wrong, the increase of nitrogen in metadimethylhydrazine is oxidized, it is a reducing agent, so a is wrong, the reaction is the recombination of atoms, so there is an endothermic and exothermic process, C is wrong, D is left, of course, there are eight electrons transferred from two N2O4 to N2 D is correct.
It doesn't seem to be a contradiction. The structure of the electron layer is the same, which means that it is the same three-layer and the same four-layer ......For example, Na and Cl, the radius of Cl is much smaller. >>>More
Color reaction: The color of a chemical is changed by a change in the chemical (new substances are generated). Nitric acid reacts with proteins and can make them yellow. >>>More