Hello everyone, today I will answer the following questions for you. There are many questions about the difference between 2 valence, 4 valence and 9 valence. What is the difference between ferrous iron and trivalent iron ions? People don’t know it yet, let’s take a look now!
Contents of this article
- What are the differences and differences between gold 49 and 59
- What is the difference between ferrous iron and ferric iron ions
1. What are the differences between Golden 49 and 59
1. What are the differences between Golden 49 and 59?
2. The difference is that the purity of Wujiu is higher, the meaning of Sijiu is 9999, that is, the impurity is one ten thousandth, and the meaning of Wujiu is 99999, the impurity It is 1/100,000, and the purity required for refining is higher. The difference is that the price of the two is definitely more expensive. Both the process and the refining difficulty are correspondingly higher, and the price also rises.
What is the difference between ferrous, ferrous and ferric ions
Observe that ferrous iron ions are green and can be seen with the naked eye.
2. Add potassium thiocyanide (not potassium hydrogen sulfide), it will not appear blood red. Then add chlorine water, it will appear blood red, it is ferrous iron ion.
3. Add potassium ferricyanate to form a blue precipitate (this is KFe[Fe(CN)6]), which is divalent iron ion.
4. Add sodium hydroxide solution to form a white precipitate, which quickly turns to gray-green, and finally, to reddish-brown. This proves the presence of iron ions.
5. Adding ferric ions to phenol will produce a purple-red color (complex)
6. Adding ferric ions to SCN-(ion) will give a blood-red color (complex)
7. Adding ferric ions to sodium hydroxide will give a reddish-brown color Precipitation, the pH of the solution from the beginning of precipitation to the completion of precipitation (at normal temperature): 2.7~3.7
8. Add acidic potassium permanganate to the solution. If it fades, it will be ferrous ions, but if it does not fade, it will be iron ions.
9. Drop two solutions on the starch potassium iodide test paper. The solution that turns blue is the iron ion solution (potassium iodide and iron ions generate iodine elements to make the starch turn blue. ), the solution that does not change blue is the ferrous ion solution.
This ends the introduction about the difference between 2 valence, 4 valence and 9 valence, and the difference between ferrous iron and trivalent iron ions. I hope it will be helpful to everyone. .
