Question

write down the preparation method of the following compounds. i)NaHCO3 ii)Na2CO3. ii)Plater of paris iv)NaOH.
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Answer 1

.i)Preparation of NaHCO3

NaCl + NH3 +H2O + CO2 --------: NaHCO 3 + NH4CL

ii) Preparation of Na2CO3

NaHCO3 -----heat-------- Na2CO3 + CO2 + H2O

iii) Preparation of POP

CaSO4.2H2O ------heat------ CaSO4.1/2H2O + 1½ H2O

iv)Preparation of NaOH

NaCl + H2O -----------electricity-------- NaOH + Cl2 + H2