15 Facts on H2SO4 + Na2S: What, How to balance and FAQs

Let us learn about a chemical reaction with unique mechanisms, exciting chemistry, and properties. Below is an explanation of the reaction between sulfuric acid and sodium sulphide.

Sulphuric acid (H₂SO₄) is also known as the king of acids due to its extensive use in producing many compounds. Sodium sulphide, or Na₂S, is a well-known inorganic chemical compound with the formula Na₂S and acts as a base.

Now we can discuss the mechanism of the reaction, such as enthalpy, type of reaction, intermolecular force, conjugate pairs, product formation, etc., in the subsequent article.

What is the product of H₂SO₄ and Na₂S

H₂SO₄ and Na₂S will be produced by the reaction between phosphoric acid and sodium sulphide as mentioned in the below-mentioned reaction.

• H₂SO₄ (aq)+Na₂S (s) = Na₂SO₄ (s)+ H₂S (aq)

What type of reaction is H₂SO₄ and Na₂S

H₂SO₄ and Na₂S are a double displacement reaction when the cation (sodium) of sodium sulphide and the anion (Sulfate) of sulphuric acid switch positions, and the formation of new compounds takes place.

How to balance H₂SO₄ and Na₂S

H₂SO₄ and Na₂S balance reactions are as follows:

H₂SO₄ + Na₂S = Na₂SO₄ + H₂S

Further, the reaction between H₂SO₄ and Na₂S is balanced using the following steps:

• First, the reaction between the aforementioned reactants must be established.

• H₂SO₄ + Na₂S = Na₂SO₄ + H₂S

• Coefficient of the individual chemical molecules are labeled as,

• H₂SO₄(a), Na₂S (b), Na₂SO₄ (c)and H₂S (d)

• Count the number of hydrogen (H), Sulphur (S), oxygen (O), and sodium (Na) on both the reactant and product sides. That gives

·        

• Now equate the number of elements from both the reactant and product sides.
• This yields the balance equation
  • H₂SO₄ + Na₂S = Na₂SO₄ + H₂S

H₂SO₄ + Na₂S titration

H₂SO₄ and Na₂S will yield acid base titration when a standard solution of Na₂S is titrated against H₂SO₄ in the presence of an indicator. Several apparatus, conditions, and procedures for the titration are discussed below:

Apparatus used

Burette, burette stand, volumetric flask, conical flask, and beakers.

Indicator

Bromophenol blue serves as an indicator

Procedure

• First, wash all the apparatus with clean water, and dry it in the oven
• Then make known the normal solution of Na₂S and H₂SO₄ using molar equations
• Fill the burette with acid till the 50ml mark and take 10 ml of Na₂S in a conical flask.
• Add a few (3) drops of indicator in a conical flask.
• Titrate the base against acid by slowly adding acid into it dropwise.
• Mark the reading of the burette when colure of the solution turns yellow to blue.
• The reading will tell about the neutralization point of the solution.
• Repeat the process in triplicate to record concordant readings.

H₂SO₄ + Na₂S net ionic equation

H₂SO₄ and Na₂S net ionic equation of is

2H⁺ + S^– = H₂S⁺

• Separate reactants and products into ions to determine which are spectators. Which is
• Na₂S (aq) + H₂SO₄ (aq) = Na₂SO₄ (aq) + H₂S (g)
• Here first split the strong electrolytes into ions (the complete ionic equation) which is
• 2H⁺ + SO₄^2- + 2Na⁺ + S^– = H₂S + 2Na⁺ + SO₄^2-
• Now cross out the spectator ions on both sides of the ionic equation
• 2H⁺ + S^– = H₂S⁺
• This yield the net ionic equation, which is
• 2H⁺ + S^– = H₂S⁺

H₂SO₄ + Na₂S conjugate pairs

H₂SO₄ and Na₂S reaction has the following conjugate pair.

• The conjugate base of H₂SO₃ is HSO^3– (bisulfite anion)
• Conjugate pair of base Na₂S is Na²⁺ (sodium ion)

H₂SO₄ and Na₂S intermolecular forces

H₂SO₄ and Na₂S reaction has the following intermolecular forces,

• H₂SO₄ and Na₂S element, H₂SO₄ is bonded via van der Waals dispersion forces, dipole-dipole interactions, and hydrogen bonding.
• Na₂S has positive to negative intermolecular forces due to its ionic bond.

H₂SO₄ and Na₂S reaction enthalpy

H₂SO₄ and Na₂S reaction enthalpy is -296.83 KJ/mol which is negative as the energy has been released from the reaction.

Is H₂SO₄ + Na₂S a buffer solution

H₂SO₄ and Na₂S can not make a buffer, as H₂SO₄ is a strong acid and Na₂S is a strong base in neutral conditions.

Is H₂SO₄ + Na₂S a complete reaction

H₂SO₄ and Na₂S are a complete reaction as they utilize entirely one of the reactants.

Is H₂SO₄ + Na₂S an exothermic or endothermic reaction

H₂SO₄ and Na₂S reaction is exothermic in nature.

• The reaction of both elements will release heat in the form of energy and can be calculated.

• Reactant = -369 kJ/mol + 814 kJ/mol = 1183
• Product = 287.8 kJ/mol + -20 kJ (g) = 307.8
• Enthalpy= Product – reactant = -875.2
• Which is negative, resulting in the release of energy resulting in an exothermic reaction.

Is H₂SO₄ and Na₂S a redox reaction

H₂SO₄ and Na₂S is not redox when phosphoric acid and hydrochloric acid react.

+2 -1         +2 -1         +2-1         +2-1

Na₂S         + H₂SO₄    =              Na₂SO₄     + H₂S  

Is H₂SO₄ + Na₂S a precipitation reaction

H₂SO₄ and Na₂S reactions are not precipitation reactions as hydrogen sulphide gas that has been produced is being released.

Is H₂SO₄ + Na₂S reversible or irreversible reaction

H₂SO₄ + Na₂S reaction is not a reversible reaction. The equilibrium cannot be shifted backward as H₂S is released from the product.

Is H₂SO₄ + Na₂S displacement reaction

H₂SO₄ and Na₂S reaction is a displacement reaction because of another displaced element from each compound. 

Conclusion

The production of sodium sulphate and the evolution of hydrogen sulphide gas resulted from the displacement reaction between sodium sulphide, a salt, and sulphuric acid, a strong acid. Exothermic in nature, the process releases energy and is irreversible in nature.