Why the aqueous solution of NaCl is neutral but an aqueos solution of Na2CO3 is basic?
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NaCl Is neutral salt as its PH is 7 and it is formed with reaction of strong acid and strong base.
NaOH + HCl ----> NaCl +H₂O
whereas Na₂Co₃ is produced by weak acid and strong base.
H₂CO₃ + NaOH ----> Na₂CO₃ +H₂O
An aqueous solution of Na2CO3 is alkaline in nature. Therefore, its pH must always be above 7
NaOH + HCl ----> NaCl +H₂O
whereas Na₂Co₃ is produced by weak acid and strong base.
H₂CO₃ + NaOH ----> Na₂CO₃ +H₂O
An aqueous solution of Na2CO3 is alkaline in nature. Therefore, its pH must always be above 7
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NaCl is salt of strong acid HCl and strong base NaOH. It does not undergo hydrolysis as there is no reaction between ions of salt NaCl with water.Aqueous solution of NaCl contains equal number of H+ and OH- ions,hence it is neutral in nature.
On other hand,sodium carbonate is a salt of weak acid H₂CO₃ and strong base NaOH. When it is dissolved in water,it undergo anionic hydrolysis.Thus salt solution contains OH- ions. Hence aqueous solution of sodium carbonate is basic in nature.
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On other hand,sodium carbonate is a salt of weak acid H₂CO₃ and strong base NaOH. When it is dissolved in water,it undergo anionic hydrolysis.Thus salt solution contains OH- ions. Hence aqueous solution of sodium carbonate is basic in nature.
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