15 Facts on HCl + Ag2C2: What, How To Balance & FAQs

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Ag2C2 ‘Silver carbide’ is the name for this chemical substance. Let us examine some facts about when Ag2C2 reacts with HCl.

The chemical compound Ag2C2, silver acetylide, is a metal acetylide that reacts with strong acids like hydrochloric acid and behaves as a salt of acetylene’s weak acid. HCl can dissociate because it is a powerful acid and reacts with many metals and other compounds. 

The anion(C2H2) of the salt is composed of three bonds that join two carbon atoms. Many facts based on the HCl + Ag2C2 reaction will be covered in the sections that follow below.

What is the product of HCl and Ag2C2?

When Hydrogen Chloride(HCl) is reacted with Silver Acetylide(Ag2C2), the products obtained are silver chloride(AgCl) and Acetylene(C2H2). A silver chloride product is formed that is insoluble in water. Ethyne gas is released during the reaction.

Ag2C2(crystal) + HCl (solution) → C2H2(g) + 2AgCl(crystal)

What type of reaction is HCl + Ag2C2?

The reaction between HCl and Ag2C2 is a Double displacement reaction.

How to balance HCl + Ag2C2?

We can balance the HCl + Ag2C2 reaction easily by following the below steps:

  • Step:1 Count the atoms in reactants and products to identify them:
  • Firstly count each kind of atom on the reactant and product sides. The following atoms are present on the reactant side: 1H, 1Cl, 2Ag, and 2C. There are 2C, 2H, 1Ag, and 1Cl atoms on the product side.
  • HCl +  Ag2C2 = C2H2 + AgCl
  • Step:2 Equalizing the number of atoms in reactants and products:
  • In HCl-Ag2C2, the atoms or molecules are arranged or balanced by multiplying 2 with HCl, and 2 with AgCl.
  • 2HCl +  Ag2C2 = C2H2 + 2AgCl
  • Step:3 Determine the coefficient:
  • The coefficients and variables are all calculated using the Gauss elimination technique. The outcome is a coefficient of 2:1::1:2.
  • Step:4 Compose the chemical equation in balance: 

2HCl +  Ag2C2 → C2H2 + 2AgCl

HCl + Ag2C2 titration

A titration between Ag and HCl can be used to measure the amount of Ag. The reaction should be carried out extremely carefully because the result is a precipitate.

Apparatus Required

White tile, volumetric and Erlenmeyer flasks, a burette(50 mL), and a burette stand are all required.

Indicator

Because it belongs to a group of acid-base reactions, the phenolphthalein indicator can be employed well to conduct the titration between HCl and Ag2C2. When the medium is alkaline, the indicator emits a pink colour, whereas an acidic media causes it to change from pink to colourless.

Procedure

  • With the use of very few chemicals, the apparatus must be cleaned correctly and rinsed with suitable chemicals.
  • Standardized HCl is poured into the Burette, and the Ag2C2 solution is ingested from the Erlenmeyer flask.
  • The reaction mixture is then supplemented with the phenolphthalein indicator and thoroughly blended(buffer solution should be added if required).
  • When titrating, HCl should be released from the Burette one drop at a time until a colour change is visible.
  • We can claim the reaction’s endpoint has been reached when a recognisable colour shift can be seen.
  • For reliable results, the aforementioned process should be carried out three times.
  • Using the equation N1V1=N2V2, we can determine the required amount.

HCl + Ag2C2 net ionic equation

HCl + Ag2C2 reaction has the following net ionic equation,

2H+ + 2Cl– + 2Ag+ + 2C– → C2H2 + 2Ag+ + Cl–.

HCl + Ag2C2 conjugate pairs

HCl + Ag2C2 reaction has the following conjugate pairs,

  • The conjugate base pair(Cl–) and the conjugate acid pair(H+ and C–).
  • The conjugate base is Ag2C2
  • The conjugate acid is HCl

HCl and Ag2C2 intermolecular forces

HCl + Ag2C2 reaction has the following intermolecular force,

  • The HCl molecule is an example of a dipole-dipole interaction in which Cl–  rapidly receives electrons from hydrogen.
  • Ag+ cation and carbide’s C-2 anion interact ionically during the intermolecular forces seen in Ag2C2.

HCl + Ag2C2 reaction enthalpy

HCl + Ag2C2 reaction has a typical reaction enthalpy of -77.8 kJ/mol.

  • ΔH⁰f (reaction) = ΣΔH⁰f (products) – ΣΔH⁰f (reactants)= -ve
  • 2HCl + Ag2C2 → C2H2 + 2AgCl 
  • Enthalpy change = [1*(-20.6) + 2*(-226.7)] – [2*(-167.15) + 1*(-354.5)] = –77.8 kJ/mol

Is HCl + Ag2C2 a buffer solution?

HCl + Ag2C2 does not create a buffer solution, due to the absence of strong acids or bases in buffer solutions. Weak bases or acids are combined with their salts and strong acid to form buffer solutions.

Is HCl + Ag2C2 a complete reaction?

HCl + Ag2C2 reaction is complete, due to the almost exact proportions in which Acetylene and Silver Chloride are generated.

HCl + Ag2C2 → C2H2 + 2AgCl

Is HCl + Ag2C2 an exothermic or endothermic reaction?

HCl + Ag2C2 reaction is exothermic due to the production of Silver Chloride, which is produced as white solid precipitation. The exothermic reaction between Silver Acetylide and Hydrogen Chloride releases a significant quantity of energy.

HCl + Ag2C2 → C2H2 + 2AgCl(white ppt)

Is HCl + Ag2C2 a redox reaction?

HCl + Ag2C2 reaction is not a redox reaction as the oxidation state is unchanged on the reactant and product sides. This indicates that the reaction is not redox.

hcl + ag2c2
The stable form of Reaction

Is HCl + Ag2C2 a precipitation reaction?

HCl + Ag2C2 reaction is a precipitation reaction because the formation of the product is AgCl. Silver chloride is a  white precipitate that settles to the bottom of the container and is insoluble in water.

Is HCl + Ag2C2 displacement reaction?

HCl + Ag2C2 reaction is a double displacement reaction as the two reactant molecules swap atoms through the product and come into contact.

Is HCl + Ag2C2 reversible or irreversible reaction?

HCl + Ag2C2 reaction is irreversible because it results in an insoluble solid precipitate and is a precipitation reaction.

Conclusion

Ag2C2 and HCl have completed their reaction by a double displacement reaction. It produces a substance called silver chloride, which is insoluble in water. It is an exothermic reaction that is irreversible.