Advertisements
Advertisements
प्रश्न
Starting with sodium chloride how would you proceed to prepare sodium carbonate?
Advertisements
उत्तर
Sodium carbonate is prepared by Solvay process. Sodium hydrogen carbonate is precipitated in a reaction of sodium chloride and ammonium hydrogen carbonate.
\[\ce{2NH_3 + H_2O + CO_2 -> (NH_4)_2 CO_3}\]
\[\ce{(NH_4)_2CO_3 + H_2O + CO_2 -> 2NH_4HCO_3}\]
\[\ce{NH_4HCO_3 + NaCl -> NH_4Cl + NaHCO_3}\]
These sodium hydrogen carbonate crystals are heated to give sodium carbonate.
\[\ce{2NaHCO_3 -> Na_2CO_3 + CO_2 + H_2O}\]
संबंधित प्रश्न
Explain why is sodium less reactive than potassium?
Compare the alkali metals and alkaline earth metals with respect to (i) ionization enthalpy (ii) basicity of oxides and (iii) solubility of hydroxides
Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals.
Carbonates
Starting with sodium chloride how would you proceed to prepare sodium hydroxide.
What happens when sodium peroxide dissolves in water?
Comment on the following observation:
The mobilities of the alkali metal ions in aqueous solution are Li+ < Na+ < K+ < Rb+ < Cs+
How would you explain the following observation?
BeO is almost insoluble but BeSO4 in soluble in water.
How would you explain the following observation?
BaO is soluble but BaSO4 is insoluble in water.
Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?
The s-block elements are characterised by their larger atomic sizes, lower ionisation enthalpies, invariable +1 oxidation state and solubilities of their oxosalts. In the light of these features describe the nature of their oxides, halides and oxosalts.
Which of the alkali metals form only the normal oxide, M2O on heating in the air?
The ratio of number of water molecules in Mohr's salt and potash alum is ______ × 10-1.
