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Anonymous users2024-02-08What solutions do you want? Copper sulfate blue, ferrous chloride green, ferric chloride light yellow, bromine water brown, iodine solution dark brown and so on.
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Anonymous users2024-02-07The color of the solution depends on the color of the ions in the solution:
Cu2+ blue: copper sulfate solution and copper sulfate crystals are all blue.
Fe2 + light green: ferrous chloride solution, ferrous sulfate crystals, ferrous sulfate solution Fe3 + yellow: ferric chloride solution.
MnO4-purple: KMno4 solution is purple, solid is the color of purple-black solid substance, and the color of the solution, which is often used as a breakthrough in inferring substances or identifying substances in junior high school chemistry. For example, it is commonly used to "three white, one blue and one reddish-brown":
caco3、baso4
AgCl is 3 white substances, Cu(OH)2 is blue, and Fe(OH)3 is reddish-brown. They are insoluble in water. baso4
AGCL is also insoluble in dilute acid (i.e., it does not react with dilute acid).
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Anonymous users2024-02-06Okay, right away.
2) The color of the liquid.
11. Colorless liquid: water, hydrogen peroxide water and potato hole.
12. Blue solution: copper sulfate solution, copper chloride solution, copper nitrate solution.
13. Light green solution: ferrous sulfate solution, ferrous chloride solution, ferrous nitrate solution.
14. Yellow number and solution: ferric sulfate solution, ferric chloride solution, ferric nitrate dissolving solution.
15. Fuchsia solution: potassium permanganate solution.
16. Purple solution: litmus solution.
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Anonymous users2024-02-051.red Fe(scn)]2+ (blood red); Cu2O (brick red); Fe2O3 (reddish-brown); red phosphorus (reddish-brown); liquid bromine (dark reddish-brown); Fe(OH)3 (reddish-brown); Ccl4 solution of I2 (fuchsia); mNO4- (purplish-red); CU (purplish-red); Phenol (pink) that has been left in the air for a long time
2.Orange: bromine water; K2Cr2O7 solution.
3.Yellow: agi (yellow); AGBR (light yellow); k2cro4 (yellow); Na2O2 (pale yellow); s (yellow); fes2 (yellow); long-term concentrated HNO3 (dissolved with NO2); Industrial concentrated hydrochloric acid (containing Fe3+); Fe3+ aqueous solution (yellow); Persistent KI solution (oxidized to I2).
4.Green: Cu2(OH)CO3; Aqueous solution of Fe2+; Cl2 (yellow-green); f2 (pale yellow-green); cr2o3
5.Blue: Cu(OH)2;; Aqueous solution of Cu2+; i2 mixture with starch.
6.Purple: KMNO4 (purple-black); i2 (purple-black); litmus (ph=8--10); Mixture of Fe3+ with phenol.
7.Black: FeO, Fe3O4, Fes, Cus, Cu2S, AG2S, PBS, CuO, Mno2, C powder.
8.White: Fe(OH)2, Agoh, Anhydrous CuSO4, Na2O, Na2CO3, NaHCO3, AGCL, BaSO4, CaCO3, CaSO3, MG(OH)2, Al(OH)3, Tribromophenol, MGO3, MgCO3, most metals, etc.
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Anonymous users2024-02-04Fe(OH)2 is an insoluble alkaline en. It's solid white, and I just looked for this yesterday as well.
Pure ferrous hydroxide is white, but it is generally difficult to see, and it is often seen as light green.
Because there is oxygen dissolved in the solution and the reaction system (open system) and the outside world there is a material exchange and energy exchange, and the oxygen in the air is constantly dissolved into the solution, and the newly formed ferrous hydroxide is quickly oxidized to iron hydroxide, so it is difficult to observe the formation of white ferrous hydroxide precipitation during the experiment, and only the mixture of oxidized ferrous hydroxide and newly formed ferrous hydroxide can be seen: some gray-green flocculent precipitates.
4Fe(OH)2 + O2 + 2H2O = 4Fe(OH)3Cu2(OH)CO3 is patina (basic copper carbonate), which means that copper is rusted. (It may be explained in this way that it is produced by the interaction of carbon dioxide and oxygen in the air).
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Anonymous users2024-02-03To correct a problem, copper ions are generally considered to be blue, but copper ions may not always appear blue, it may also appear green or other colors, because it combines different numbers of water molecules, it will appear different colors.
The common accommodating acid-base salts in chemistry are generally colorless, but ferric ions will appear yellow, and freshly chlorinated water will appear yellow-green because it contains chlorine molecules, as well as purple permanganate.
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Anonymous users2024-02-02Fe3 + yellow solution.
The permanganate ion is purplish-red.
Alkaline solutions are generally colorless.
The alkaline solution gives phenolphthalein a red color.
The alkali solution is litmus solution that is blue in color.
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Anonymous users2024-02-01In aqueous solutions, some ions are colored. Common colored ions are: The color of colored ions.
Cu2+ copper ions--- blue Fe2+ ferrous ions--- light green Fe3+ iron ions--Medium Mn2+ manganese ions--- light pink CO2+ cobalt ions--- pink Ni2+ nickel ions--- green Cr2+ - blue-green Cr3+ - green CD2+ - blue-green Au3+ + gold ions--- golden yellow MnO4-high manganese ions --Purple MnO42- -dark green CRO4 2- -Yellow Cr2O7 2- - orange.
Note: It must be a solution.
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Anonymous users2024-01-31Colorless liquids: water, hydrogen peroxide.
Blue solution: copper sulfate solution, copper chloride solution, copper nitrate solution light green solution: ferrous sulfate solution, ferrous chloride solution, ferrous nitrate solution yellow solution: ferric sulfate solution, ferric chloride solution, ferric nitrate solution, fuchsia solution: potassium permanganate solution.
Purple solution: litmus solution.
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Anonymous users2024-01-30Different solutions are different in color. Usually the color of the internal ions (e.g. copper sulfate is the color of copper ions, etc.). If it is precipitated, it is a cloudy precipitated color. If it is left for a long time, it is the color of the remaining solution.
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Anonymous users2024-01-29What kind of chemical solution you asked, different chemicals have different colors.
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Anonymous users2024-01-281. "Put activated carbon": put activated carbon is to use its adsorption properties, but it also depends on the adsorption capacity, activated carbon adsorbs organic matter effect, for Cu2+ is not satisfactory (note: the role of activated carbon is only adsorption, does not change the structure and nature of the adsorbed substance, and its own properties will not be changed);
2. "Or after adsorbing the color of litmus, are there still molecules of litmus in the solution?" There will be some, some are absolute, and none are relative;
3. "What happens to the litmus reaction can change color": it turns red by H+ and blue by OH-, which is a change in its structural composition, so the color also changes;
4. The structure of "colorless matter generated by SO2 fading" is relatively complex, far beyond the scope that middle school students can accept, so I don't know (this belongs to adding something to the colored substance, and the structure changes, of course, the color will change);
5. "Is hypochlorous acid itself still there": the answer is the same as 2;
6. "Why does the color fade after being oxidized": The answer is similar to 4, but 4 belongs to the addition, and here it is destroyed.
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Anonymous users2024-01-27The concentration of colored ions in the solution affects the performance of the solution; For example:
The solution containing Fe2+ --- light green.
The solution containing Fe 3+ --- yellow.
Solution containing Cu2+ --- blue.
If you're a high school student, these are enough;
If you're looking for a deeper understanding, then look at university textbooks on the color of complexed ions.
The principle of SO2 fading substances is that SO2 (or H2SO3) will combine with colored organic matter to form a colorless substance. Because the combined colorless substance is unstable and recomposes into a colorless substance when heated, the bleaching of SO2 is not as permanent as Cl2 (i.e., the bleached substance does not return to its original color). In addition, SO2 cannot bind to individual organic compounds (e.g., litmus) to fade them, so SO2 bleaching is selective.
The organic molecules of colored substances are oxidized with hypochlorous acid and fade;
Activated carbon is a porous substance, which can adsorb colored substances and make them fade, which is a physical change, and activated carbon will not change color after adsorption. 】
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Anonymous users2024-01-26The blue color of the copper salt solution is due to the coordination of Cu2+ with water to form blue Cu(H2O)2+, Fe3+ coordination with water to form yellow Fe(H2O)6 3+ activated carbon can not adsorb ions. Chemically speaking, the removal of an ion means that the residual concentration of the ion in the solution is less than 1 10 -5mol l
The adsorption of litmus by activated carbon is a physical change. SO2 fades magenta and is an addition of SO2 and pigment.
Hypochlorous acid fades other substances and is reduced to Cl-
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Anonymous users2024-01-251.Activated carbon adsorbs tiny particles, so it does not fade; The blue color fades, there are copper ions in the solution, and there are absolutely none, but it has to be less, just like AGCL, when the ion concentration is less than KSP, it will also dissolve; 3, also has litmu4, H2SO3; 5.No, hypochlorous acid is a strong oxidizing agent, hope to adopt, thank you.
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Anonymous users2024-01-24Fe(scn)3+ (blood red).
Cu2O (brick red);
Fe2O3 (reddish-brown);
red phosphorus (reddish-brown);
liquid bromine (dark reddish-brown);
Fe(OH)3 (reddish-brown);
Add the ccl4 solution of iodine (fuchsia).
KMNO4 (fuchsia).
Phenol (pink) that has been left in the air for a long timeBromine water.
K2Cr2O7 solution bromine, soluble in organic solvents, orange or orange-red*, methyl orange in solution of pH, orange AGI (yellow), AGBR (light yellow).
k2cro4 (yellow);
Na2O2 (pale yellow);
S (yellow) Fes2 (yellow).
long-term concentrated HNO3 (dissolved with NO2);
Industrial concentrated hydrochloric acid (containing Fe3+);
Fe3+ aqueous solution (yellow);
Long-standing KI solution (oxidized to I2) Cu2(OH)2CO3Fe2+ in water.
feso4·7h2o
Cl2 (yellow-green);
f2 (pale yellow-green);
cr2o3 cu(oh)2
cuso4·5h2o
Aqueous solution of Cu2+;
i2 mixture with starch. KMNO4 (purple-black) I2 (purple-black).
litmus (ph=8--10);
Fe3+ mixture with phenol FeO
fe3o4fescus
cu2sag2s
pbscuo
MnO2C powder. fe(oh)2
Agoh anhydrous cuso4
na2ona2co3
nahco3
agclbaso4
caco3caso3
mg(oh)2
al(oh)3
Tribromophenol. mgomgco3
Most of the metals, etc. se
Fe(OH)2 becomes the intermediate product of Fe(OH)3 and the gray-green CuCl2 crystals are brownish-yellow.
FeCl3 crystals are brownish-red Ag2O
Bromobenzene iodine wine with bromine dissolved.
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