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Question

Write the balanced chemical equation when Hydrochloric acid reacts with Sodium Bicarbonate?


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Solution

Step1: Reacting to the given molecules:

  • Hydrochloric acid reacts with Sodium Bicarbonate to form Sodium Chloride, Carbon Dioxide and water.
  • The unbalanced chemical equation can be written as:
  • HCl(aq)+Na2CO3(aq)NaCl(aq)+CO2(g)+H2O(l)HydrochloricSodiumSodiumAcidBicarbonateChloride

Step2: Balancing the chemical equation

  • The total number of atoms of each element on the reactant side and the product side must be compared.
  • On the reactant side: 2 Sodium atom from Na2CO3, 3 Oxygen atom from Na2CO3,1 Carbon atom from Na2CO3, 1 Hydrogen atom from HCl and 1 Chlorine atom from HCl
  • On the product side: 2 Sodium atom from NaCl, 2 Chlorine atoms from NaCl, 1 Carbon atom from CO2, 2 Hydrogen atoms from H2O and 3 Oxygen atoms from 2 Oxygen atom from CO2 and 1 Oxygen atom from H2O.

Step3: Balancing the reactant molecules by multiplying 2 by HCl, 2 by NaCl

  • The chemical reaction is as follows:
  • 2HCl(aq)+Na2CO3(aq)2NaCl(aq)+CO2(g)+H2O(l)HydrochloricSodiumSodiumAcidBicarbonateChloride
  • On the reactant side: 2 Sodium atom from Na2CO3, 3 Oxygen atom from Na2CO3,1 Carbon atom from Na2CO3, 2 Hydrogen atom from HCl and 2 Chlorine atom from HCl
  • On the product side: 2 Sodium atom from NaCl, 2 Chlorine atoms from NaCl, 1 Carbon atom from CO2, 2 Hydrogen atoms from H2O and 3 Oxygen atoms from 2 Oxygen atom from CO2 and 1 Oxygen atom from H2O.
  • After multiplication, we have an equal number of molecules on both sides of the reaction.

Step4: Balanced chemical equation is as follows:

  • The chemical reaction is as follows:
  • 2HCl(aq)+Na2CO3(aq)2NaCl(aq)+CO2(g)+H2O(l)HydrochloricSodiumSodiumAcidBicarbonateChloride

Hence, the equation is balanced.


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