15 Facts on HCl + Na2S: What, How to Balance & FAQs

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:

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 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 a combination reaction.

How to 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 be balanced
• The number of Na and Cl is needed to 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 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

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 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 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 form 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 form the reactants.

Is HCl + Na₂S displacement reaction?

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

Conclusion

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