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Baking soda is Sodium hydrogen carbonate (NaHCO₃)
Preparation:
NaCl + H₂O + CO₂+ NH₃  NH₄Cl + NaHCO₃

Bleaching powder is represented as CaOCl₂, though the actual composition is quite complex.
Preparation: Bleaching powder is produced by the action of chlorine on dry slaked lime.
Ca(OH)₂ + Cl₂  CaOCl₂+ H₂O

Washing soda is  Sodium carbonate Na₂CO₃ .10H₂O
Preparation:
In the first step, sodium carbonate is obtained by heating baking soda.
2 NaHCO3Na₂CO₃ + H₂O + CO₂
                 Heat

Then washing soda is produced by recrystallisation of sodium carbonate
Na₂CO₃ + 10H₂O  Na₂CO₃ .10H₂O