Posted by Lena on Wednesday, July 22, 2009 at 12:18am.
The question is a little confusing. I don't know what potassium dicarbonate is. Potassium carbonate is K2CO3.
oops sorry :S I meant Cromate. Potassium Dichromate. In a lab that I did I mixed 0.1 M K2CrO4 with 2 drops of NaOH and I added Ba(NO)2 until I noticed a color change. When I did this, the K2CrO4 which was initally yellow formed a white precipitate and on the top there was clear orange liquid. Why did that happen? How did the precipitate form?
The ppt is BaCrO4 (I think you mixed it with Ba(NO3)2.
The orange color comes from the equilibrium between CrO4 ion and Cr2O7^-2. Look up the equilibrium on google. I have problems at home.
Thanks :)
Related Questions
chemistry - HCl is titrated with NaOH. When doing the titration, some of the ...
chemisty - NaOH + HCl -> NaCl + H2O What is the molarity of a NaOH ...
Chemisty - The flask shown here contains 10.0 mL of HCl and a few drops of ...
Chemisty - The flask shown here contains 10.0 mL of HCl and a few drops of ...
Chemisty - The flask shown here contains 10.0 mL of HCl and a few drops of ...
chemistry - If it requires 30.0 milliliters of 1.2 molar HCl to neutralize 20.0 ...
Chem - NaOH + HCl ---> NaCl + H2O is that what would happen?
chem - HCl is a strong acid and ionizes 100%. NaOH is a strong base and ionizes ...
chemistry - when 12.76mL of HCl of unknown concentration (but less than the base...
Chemisty (please read soon) - which will become a buffer in 1L of H2O? a) 0.3 ...
For Further Reading
