Which soluble substances are obtained when ba | vedclass

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

Question

(C) In the Bayer's process for the extraction of aluminum from bauxite,the powdered ore is digested with a concentrated solution of $NaOH$ at $473 - 5

Vedclass · Accepted Answer

Sodium aluminate,Sodium silicate

Vedclass · Answer

(C) In the Bayer's process for the extraction of aluminum from bauxite,the powdered ore is digested with a concentrated solution of $NaOH$ at $473 - 523 \ K$ and $35 - 36 \ bar$ pressure.$Al_2O_3 \cdot 2H_2O + 2NaOH \rightarrow 2NaAlO_2 + 3H_2O$$SiO_2 + 2NaOH \rightarrow Na_2SiO_3 + H_2O$Here,$Al_2O_3$ (alumina) dissolves to form sodium aluminate $(NaAlO_2)$ and silica $(SiO_2)$ dissolves to form sodium silicate $(Na_2SiO_3)$.Both are soluble in the reaction mixture.

Which soluble substances are obtained when bauxite is treated with a solution of $NaOH$ at a temperature of $473 - 523 \ K$ and a pressure of $35 - 36 \ bar$?

Similar Questions

Which one of the following is true?

In the froth floatation process for the purification of ores,the ore particles float because

Which of the following methods is used to separate wolframite and stannic oxide present in cassiterite?

Which of the following is used as a depressant in the separation of $ZnS$ from $PbS$ in the froth flotation process?

Explain the concentration of ore by Hydraulic Washing.

Vedclass Test Series

Exam Paper Generator

Online Exam Module