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Anonymous users2024-02-07How can there be such a problem? That's a question that can be difficult for physicists!
In simple terms, what color the solution presents is related to the solute in the solution.
Let's put it simply: in terms of ions alone: Cu2+ (blue), Fe3+ (yellow), Fe2+ (light green), Mno4- (purple red), CRO42- (yellow), CR2O72- (orange-red), etc.
An aqueous solution containing these ions will take on the corresponding color.
In terms of molecules: Cl2 (yellow-green), BR2 (yellow-orange-yellow), I2 (yellow-orange-red), etc.
In the case of colloidal particles: Fe(OH)3 (reddish-brown).
It's more complicated to say
Ions appear different colors in solution because ions and water form hydrated ions, and hydrated ions absorb light energy and there is an electronic (or atomic) energy level transition - absorbing a specific wavelength of light to present the complementary color of that color light - this is the principle of absorption spectrum; If an ion (or atom) jumps back from a higher energy level, it also releases a specific wavelength of light, resulting in a specific color, which is how the emission spectrum works.
We can analyze the constituent elements of stars at a distance, such as the constituent elements of the sun, based on the analysis of sunlight.
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Anonymous users2024-02-06It is the ion that has color.
For example, iron ions are yellow, ferrous ions are light green, permanganate ions are purple, and copper ions are green.
There are also some molecules that are colored, such as bromine and iodine.
After the reaction, the colored molecules or ions are no longer present and the color changes.
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Anonymous users2024-02-05The color of the solution:
All solutions containing Cu2+ are blue;
All solutions containing Fe2+ are light green;
Where the solution containing Fe3+ is brownish-yellow, the rest of the solution is generally not colorless, and the potassium permanganate solution is the color of purple-red liquid
1. Colorless liquid: water, hydrogen peroxide.
2. Blue solution: copper sulfate solution, copper chloride solution, copper nitrate solution.
3. Light green solution: ferrous sulfate solution, ferrous chloride solution, ferrous nitrate solution.
4. Yellow solution: ferric sulfate solution, ferric chloride solution, ferric nitrate solution.
5. Purple-red solution: potassium permanganate solution.
6. Purple solution: litmus solution.
Solution classificationSaturated solution: A solution in which the solute cannot continue to be dissolved in a certain temperature and a certain amount of solvent.
Unsaturated solution: A solution in which the solute can continue to be dissolved in a certain temperature and a certain amount of solvent.
Interconversion of saturated and unsaturated solutions:
Unsaturated solutions can be converted into saturated solutions by increasing the solute (which is applicable to all solutions) or decreasing the temperature (for most solutes where the solubility increases with temperature, and vice versa), evaporating solvents (when the solvent is liquid).
Saturated solutions can be converted to unsaturated solutions by increasing the solvent (for all solutions) or by increasing the temperature (for most solutes whose solubility increases with temperature, and vice versa, by decreasing the temperature, such as lime water).
The above content refers to: Encyclopedia - Solution.
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Anonymous users2024-02-04The solution of Fe2+ --- light green.
The solution containing Fe 3+ --- yellow.
Solution containing Cu2+ --- blue.
If both Fe2+ and Fe3+ are contained, the yellow color will mask the light green color, and the solution will be yellow. If it also contains Cu 2+, it will be green.
Extended Materials. Common colored ions are:
Cu2+ copper ions --- blue.
Fe2+ ferrous ions --- light green.
Fe3+ iron ion -- almost colorless lilac (yellow is the color of spring scattered in general solution.) ）
Mn2+ manganese ions --- light pink.
CO2+ cobalt ions --- pink.
Ni2+ nickel ions --- green.
CR2+ Chromium Pants Ion - Blue-green.
Cr3 + chromium ion - green.
CD2+ cadmium ion - blue-green.
AU3+ gold ions--- golden yellow.
mNO4- permanganate ion - purplish-red.
MNO42-manganate ion -- dark green.
CRO42-chromate ion--yellow.
CR2O72-dichromate ion--orange.
Fe(scn)]2+ ferric thiocyanide complex ion--- blood red.
CuCl4]2-tetrachlorocopper complex ion --- yellow.
Blood Red: The color of Fe3+ when it encounters SCN-.
Copper sulfate itself is white, and it turns blue when it encounters water, which is why you can use dry copper sulfate to check whether the product has water.
Glaciers contain organic matter and minerals, experts have found that the substances in the glacier are the reason for the glacier's green color through spectroscopy and isotope measurement, and the various parts of the glacier contain different degrees of organic matter and minerals, there are no bubbles at the bottom of the glacier, so the density is small, sometimes it is knocked over, and the upper and lower parts almost absorb the strongest reflected blue light, so only green remains.
The liver is hot, and the water is less drunk, and that's it.
It's a good color, but it depends on what color you like, and most of the Chow Chows are raised nowadays that love meat, and the color is normal.
Hello classmates, junior high school is generally hydrogen ion or hydroxide ion concentration of 1mol l. So the pH belongs to O to 14. In fact, the pH can be less than zero. Complete.