What happen when oxygen through ammonium chloride aolution
Answers
Answer :A mechanistic study of the aeration reaction used for removing iron from a reduced ilmenite matrix is described. Using polarization and mixed potential measurements, it was shown that the rate of the aeration reaction in ammonium chloride solution is largely determined by the speed at which oxygen diffuses to the reduced ilmenite surface, and that, within the limit of experimental error, the reaction rate was independent of the Ti2O3 content in the reduced ilmenite. Diffusion control was confirmed by rate measurements. Aeration rate measurements were also carried out in other electrolytes in addition to ammonium chloride. It was concluded from these and other studies that the ammonium chloride plays three distinct and important roles in the aeration reaction. Firstly, the ammonium ion acts as a buffer for hydroxyl ions and prevents excessively high local pH values, which might otherwise cause precipitation of iron (II) hydroxide before the iron (II) ions could diffuse from the rutile matrix. Secondly, the ammonia formed as a result of this buffering reaction complexes iron (II) ions until they also have moved away from the regions of high pH, thus preventing the precipitation of iron (II) hydroxide in the pores of the rutile. Finally, the chloride ion helps to break down any passive films which might form during aeration.
Explanation:
Explanation:
Solution of CuCl in NH 3 or ammoniacal CuCl absorbs carbon monoxide CO to form colourless complexes. For example, formation of chloride-bridged dimer such as [CuCl(CO)] 2.