In the leaching of alumina from bauxite,the o | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) In bauxite,impurities of $Fe_{2}O_{3}$,$TiO_{2}$,and $SiO_{2}$ are present.$Fe_{2}O_{3}$ and $TiO_{2}$ are basic oxides,therefore they do not reac

Vedclass · Accepted Answer

$SiO_{2}$

Vedclass · Answer

(B) In bauxite,impurities of $Fe_{2}O_{3}$,$TiO_{2}$,and $SiO_{2}$ are present.$Fe_{2}O_{3}$ and $TiO_{2}$ are basic oxides,therefore they do not react with or dissolve in $NaOH$.$SiO_{2}$ is an acidic oxide; it reacts with $NaOH$ to form soluble sodium silicate,hence it leaches out.The chemical reaction is: $SiO_{2} + 2NaOH \rightarrow Na_{2}SiO_{3} (aq.) + H_{2}O$.

In the leaching of alumina from bauxite,the ore impurity expected to leach out in the process by reacting with $NaOH$ is:

Similar Questions

Haematite ore is concentrated by

Which substances are used as stabilizers in the froth flotation process?

Explain the concentration of ore by Hydraulic Washing.

Which of the following ores is concentrated by the leaching process?

Chemical leaching is useful in the concentration of

Vedclass Test Series

Exam Paper Generator

Online Exam Module