hcl na2s

HCl + Na2S display that a chemical reaction happens between HCl and Na2S when the compounds are mixed up with each other. Let us identify some more facts about it below:

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The reaction between HCl (Hydrochloric acid) and Na2S (Sodium sulphide) reveals that HCl is a strong acid which can actively break the neutral compound Na2S. Anhydrous Sodium sulphide is found in solid state that reacts with Dilute HCl which is found to tướng be less toxic in nature.

With a balanced chemical equation of this reaction the study about addition of HCl in Na2S would be descried throughout this article.

What is the product of HCl and Na2S?

One of the most toxic gases H2S (Hydrogen sulphide) and common NaCl salt are produced when the anhydrous, Na2S is added with dilute HCl.

The complete reaction is given below:

Na2S (s) + HCl (dil) → NaCl (aq) + H2S (g) ↑

What type of reaction is HCl + Na2S?

HCl + Na2S can be considered as an acid-base reaction where HCl works as a Bronstead acid and Na2S is considered as bronstead base. This reaction is also referred to tướng a combination reaction.

How to tướng balance HCL + Na2S?

Balancing a chemical equation is followed by some easy regular steps. The steps are as follows:

  • Step 1: Calculating the number of each participating atoms in reactants and products
  • The general equation is Na2S + HCl → NaCl + H2S
  • There are 2 Na, 1 S, 1 H and 1 Cl atoms are present in reactants
  • 1 Na, 1 Cl, 2H and 1 S atoms are present in products
  • Step 2: Recognising the atoms in each side which needs to tướng be balanced
  • The number of Na and Cl is needed to tướng be adjusted
  • So now the equation found as Na2S + HCl → 2NaCl + H2S
  • Multiplying NaCl with 2 is creating issue in balancing the number of Cl in each side.
  • Step 3: final attempt to tướng balance the equation
  • Now the equation could be Na2S + 2HCl → 2NaCl + H2S
  • Step 4: Final representation of the balanced equation
  • The balanced equation is Na2S + 2HCl = 2NaCl + H2S

HCl + Na2S titration

Titration does not take place for the solution of HCl and Na2S. Na2S is neither acid nor base and titration can be happened between acid and base only. Therefore, the meaning of titration is undefined in the case of this reaction.

HCl + Na2S net ionic equation

The net ionic equation of the reaction between HCl and Na2S is found as Na2S (s) + 2HCl (dil) → 2NaCl (aq) + H2S (g) ↑

HCl + Na2S conjugate pairs

HCl + Na2S has the following conjugate pair,

  • HCl is the conjugate acid
  • Na2S is considered as conjugate base
  • Cl is the conjugate base of H+
  • S- is conjugate base of Na2+

HCl and Na2S intermolecular forces

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HCl + Na2S intermolecular forces are as follows:

  • The intermolecular force between H and Cl in HCl is stronger as it represents dipole-dipole force.
  • In Na2S, the intermolecular force between two Na and one S atom is considered as strong due to tướng ionic bond
  • Ionic force is utilised by Na and S molecules while forming Na2S.

HCl + Na2S reaction enthalpy

HCl + Na2S reaction enthalpy is -120.9kJ.

Is HCl + Na2S a buffer solution?

HCl + Na2S is a buffer solution as the pH level of this solution is found to tướng be neighbourhood of 7 as the pH of Na2S is 7.

Is HCl + Na2S a complete reaction?

HCl + Na2S is a complete reaction as the reaction forms stable products from the reactants.

Is HCl + Na2S an exothermic or endothermic reaction?

HCl + Na2S is an exothermic reaction as it is clear that the enthalpy of the reaction appears with negative value. It means the reaction gives out heat energy with products.

Is HCl + Na2S a redox reaction?

HCl + Na2S is not a redox reaction as the oxidation states of Na, S, Cl and H remains same products as in the reactants.

Is HCl + Na2S a precipitation reaction?

HCl + Na2S does not display precipitation reaction as none of the products khuông precipitation in solution.

Is HCl + Na2S reversible or irreversible reaction?

HCl + Na2S represents an irreversible chemical reaction where the products does not proceed with another chemical reaction to tướng khuông the reactants.

Is HCl + Na2S displacement reaction?

HCl + Na2S is considered as a double displacement reaction where Chlorine (Cl) gets displacement from HCl to tướng Na2S and Sulphur (S) is displaced from Na2S to tướng HCl.


HCl + Na2S is the combination of bronstead acid and bronstead base which creates suitable combination reaction. Double displacement takes place ion between molecules sánh it is also considered as double displacement reaction. However, this is an exceptional acid-base reaction without formation of water at the over.

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