Discover The 13 Incredible Facts On HCl + As2S5 Reaction

Diarsenic pentasulfide is solid inorganic pigment. Let us read how As2S5 reacts with hydrochloric acid (HCl) in the article below.

As2S5 and HCl react to produce AsCl5 (arsenic pentachloride) and H2S (hydrogen sulfide). HCl is an important chemical present in the digestive systems of humans. HCl has a strong acidic nature with a pungent smell. As2S5 is mainly found as pigments and reaction intermediates and is applied for laboratory purposes.

This article will discuss key features of the HCl + As2S5 reaction, like the type of reaction, balanced chemical equation, conjugate pairs and intermolecular forces through this article.

What is the product of HCl and As2S5

AsCl5 (arsenic pentachloride) and H2S (hydrogen sulfide) are the products of the As2S5 and HCl chemical reaction. The chemical equation for the reaction is:

HCl + As2S5 = AsCl5 + H2S

What type of reaction is HCl + As2S5

The HCl + As2S5 reaction is a double displacement reaction.

How to balance HCl + As2S5

The balanced chemical equation is,

10 HCl + As2S5 = 2 AsCl5 + 5 H2S

  • The unbalanced form of the chemical equation is,
  • HCl + As2S5 = AsCl5 + H2S
  • The elements that are not balanced are identified. In the above equation, As, S, Cl and H atoms are unbalanced.
  • The smallest whole number multiple of the atoms of each element is determined, which is given below:
S.no.AtomCoefficient
1.H10
2.Cl10
3.As2
4.S5
Coefficient values
  • Coefficients 10, 2 and 5 are added to HCl, AsCl5 and H2S to balance the chemical equation.
  • The balance chemical equation thus obtained is,
  • 10 HCl + As2S5 = 2 AsCl5 + 5 H2S

HCl + As2S5 titration

The titration of As2S5 and HCl is not feasible as titration can only occur between an acid and base or an oxidising and reducing agent.

HCl + As2S5 net ionic equation

The net ionic equation for HCl + As2S5 reaction is,

10 H+ (aq.) + 10 Cl (aq.) + As2S5 (aq.) = 2 AsCl5 (aq.) + 5 H2S (g)

  • Write the balanced molecular equation for HCl + As2S5.
  • 10 HCl + As2S5 = 2 AsCl5 + 5 H2S
  • Mark each reactant and product with its chemical state (s, l, g or aq.).
  • 10 HCl (aq.) + As2S5 (aq.) = 2 AsCl5 (aq.) + 5 H2S (g)
  • Dissociate the strong electrolytes into their ions.
  • 10 H+ (aq.) + 10 Cl (aq.) + As2S5 (aq.) = 2 AsCl5 (aq.) + 5 H2S (g)
  • Remove all the spectator ions to obtain the net ionic equation. In this case, no spectator ion is present. Thus, the balanced net ionic equation is,
  • 10 H+ (aq.) + 10 Cl (aq.) + As2S5 (aq.) = 2 AsCl5 (aq.) + 5 H2S (g)

HCl + As2S5 conjugate pairs

HCl and As2S5 collectively do not have any conjugate pairs. But here, the conjugate pair of HCl contains its conjugate base Cl.

HCl and As2S5 intermolecular forces

The intermolecular forces of reactants and products involved are as follows:

  • Dipole-dipole interactions are also present in H2S.
  • AsCl5 is a non-polar molecule.

Is HCl + As2S5 a buffer solution

HCl + As2S5 is not a buffer solution because HCl is a very strong acid, but there must be present a weak acid or base with its conjugate base or acid in order to obtain a buffer solution.

Is HCl + As2S5 a complete reaction

The H­Cl + As2S5 reaction is a complete reaction; no further steps are possible after the mentioned one.

Is HCl + As2S5 an exothermic or endothermic reaction

The HCl + As2S5 reaction is an exothermic reaction as it is accompanied by the gas evolution.

Screenshot 20221129 200324
Exothermic reaction graph

Is HCl + As2S5 a redox reaction

The HCl + As2S5 reaction is not a redox reaction, as the oxidation state of each atom is stable throughout the reaction.

Is HCl + As2S5 a precipitation reaction

HCl + As2S5 reaction is not a precipitation reaction as no solid products formed during the reaction progression.

Is HCl + As2S5 reversible or irreversible reaction

The HCl + As2S5 reaction is an irreversible reaction as the reaction path has only one way and the H2S gas evolved cannot be reverted to the reaction mixture.

Is HCl + As2S5 displacement reaction

The HCl + As2S5 reaction is a double displacement reaction in which H and As atoms replace each other from their respective compounds to produce new ones.

Conclusion

This article concludes that As2S5 reacts with HCl, evolving heat and hydrogen sulfide gas in the atmosphere. The process is irreversible and no spectator ions are present in the reaction progress. Both the atoms (As and H) can displace each other from their respective ions.