The commerical producation of sodium carbonate is done by _____.

Options

A. Lead-chamber process
B. Haber's process
C. Solvay's process
D. Castner's process

Answer

C

Explanation

Solvay’s process :
1. Preparation of a saturated aqueous solution of NaCl
`NaCl+H_(2)O`
2. Thermal decomposition of limestone to `CO_(2)` and CaO
`CaCO_(3)toCaO+CO_(2)`
3. Preparation of brine solution saturated with ammonia
`NaCl+H_(2)OtoNH_(3)`
4. The saturation of the resulting solution with `CO_(2)`. The reaction proceeds in the following stages.
`2NH_(3)+CO_(2)+H_(2)Oto(NH_(4))_(2)CO_(3)`
`(NH_(4))_(2)CO_(3)+H_(2)O+CO_(2)to2NH_(4)HCO_(3)`
Then the resulting ammonium bicarbonate reacts with NaCl.
`NaCl+NH_(4)HCO_(3)toNaHCO_(3)+NH_(4)Cl`
5. Filtering and washing the precipitated sodium bicarbonate.
6. Calcination received `NaHCO_(3)` to `Na_(2)CO_(3)`
`2NaHCO_(3)toNa_(2)CO_(3)+H_(2)O+CO_(2)`.