15 Facts on HBr + Na: What, How To Balance & FAQs

The inorganic compound hydrogen bromide has the formula HBr. Let us examine the chemical reactions between HBr and Na.

Hydrogen bromide(HBr) is made from a colourless gas. Sodium(Na) is a sensitive and highly reactive metal that has a silvery-white hue. Na is a free metal with an Atomic number of 11, and an atomic weight of 22.98. It has a relative density of 0.968 g/cm3, is a soft metal and has a low melting point.

Melting and spontaneous ignition of sodium metal results in the production of HBr and Na reactive hydrogen. In the section below, let us discuss how HBr and Na react and balance the equation.

What is the product of HBr and Na?

The products obtained are Sodium bromide(NaBr) and Hydrogen(H2) gas when Sodium(Na) reacts with Hydrogen bromide(HBr).

Na + HBr → NaBr + H2

What type of reaction is HBr + Na?

HBr + Na includes the following type of reaction:

How to balance HBr + Na?

The following must be done to balance the equation Na + HBr → NaBr + H2:

  • Give the equation a variable name for each chemical to show the unidentified coefficients (reactant or product).
  • aNa + bHBr→ cNaBr + dH2
  • The number of atoms of each element (Na, H, and Br) in each reactant or product should be represented by a term in an equation.
  • Na: 1a + 0b = 1c + 0d
  • H: 0a + 1b = 0c + 2d
  • Br: 0a + 1b= 1c + 0d
  • Gauss elimination, substitution can be used to determine each variable’s value.
  • Simplifying the result will allow obtaining the smallest, complete integer values.
  • a = 2 (Na), b = 2 (HBr), c = 2 (NaBr), d = 1 (H2)
  • Replacing coefficients and evaluating the outcomes
  • 2Na + 2HBr = 2NaBr + H2
Element 
Symbol
ReactantsProducts
Na22
H22
Br22
Reactants and Products
  • The equation 2Na + 2HBr → 2NaBr + H2 is balanced because each element is present in equal amounts in both the reactants and the products.

HBr + Na titration

The HBr + Na titration system is not feasible because Na is metal and HBr is an acid that cannot perform acid-base titration.

HBr + Na net ionic equation

HBr + Na’s net ionic equation is as follows:

2Na(s) + 2H+(aq) + 2Br(aq) → 2Na+(aq) + 2Br(aq) + H2(g)

The following procedures are necessary to derive the net ionic equation:

  • Create a chemical equation that is balanced overall.
  • 2Na + 2HBr = 2NaBr + H2
  • Due to its strength as an electrolyte, HBr will first ionise into a proton and bromide ions.
  • Na still exists in its solid state.
  • The byproduct NaBr then similarly separates into Na+ and corresponding Br-.
  • H2 continues to exist in gaseous form.
  • The only species included in the balanced net ionic equation are reaction-specific species. It can be found by eliminating the ions from the entire ionic equation that appear on both the reactant and product sides.
  • 2Na(s) + 2H+(aq) → 2Na+(aq) + H2(g)

HBr + Na conjugate pairs

HBr + Na has the following conjugate acid-base pairs,

  • Na is a powerful base in form of NaOH, whereas HBr is a powerful acid.
  • Br is the conjugate base pair of HBr.
  • H+ is the conjugate acid pair of HBr.
  • Na is the metal.

HBr and Na intermolecular forces

HBr + Na interact through several different intermolecular forces:

  • HBr + Na reacts and caused London dispersion forces by the movement of electrons.
  • Ion-dipole interactions occur when the slightly positive sodium atom bonds with the slightly negative bromine atom in the HBr molecule.
hbr + na
Ion-dipole interaction
  • Hydrogen bonding occurs when the lone pair of electrons on the Na atom and the hydrogen atom in the HBr molecule create a strong bond.

HBr + Na reaction enthalpy

HBr + Na has a standard reaction enthalpy of -864.3kJ/mol. 

  • The reaction between HBr and Na is exothermic and results in the release of energy. 
  • The hydrogen bonds that form and the interactions between the molecules’ dipole ends cause the energy to be released.
MoleculeEnthalpy
(KJ/mol)
HBr-36.23  
Na107.32
NaBr-361.06
H2    0
Enthalpy of Reactant
  • ΔH⁰f(reaction) = ΣΔH⁰f(products) – ΣΔH⁰f(reactants)= -ve
  • 2Na + 2HBr → 2NaBr + H2
  • ΔH°rxn = [(2*-361.06 + 0) – (2*107.32 + 2*-36.23) = -864.3kJ/mol.
  • ΣΔH°f(reactants) > ΣΔH°f(products), is exothermic.

Is HBr + Na a buffer solution?

HBr + Na do not combine to generate a buffer solution

  • A buffer solution can withstand minor additions of acid or base without significantly changing its pH. 
  • Sodium bromide(NaBr) and hydronium ions (H3O+) are the products of the reaction between HBr and Na. 
  • These molecules can’t buffer the solution because they don’t react further with new bases or acids.

Is HBr + Na a complete reaction?

HBr + Na is a complete reaction, This is because the reaction continues until all of the reactants and products have been produced.

Is HBr + Na an exothermic or endothermic reaction?

HBr + Na is an Exothermic reaction. Due to the negative reaction’s enthalpy, which is -103.5 kJ/mol, energy is released when the reaction takes place.

Is HBr + Na a redox reaction?

HBr + Na is not a redox reaction, because oxidation and reduction reactions take place simultaneously, this is known as a redox reaction. There are no oxidation or reduction processes in the interaction between HBr and Na.

Is HBr + Na a precipitation reaction?

HBr + Na is not a precipitation reaction because a precipitation reaction is when two soluble compounds combine to form an insoluble solid. There is no solid product of the interaction between HBr and Na.

Is HBr + Na reversible or irreversible reaction?

HBr + Na irreversibly react with one another. This is so that the products of the reaction, once created, cannot be changed back into the reactants.

Is HBr + Na displacement reaction?

HBr and Na’s interaction is not a displacement reaction. When a more reactive ingredient removes a less reactive element from a combination, it is known as a displacement reaction. There is no elemental displacement during the reaction between HBr and Na.

Conclusion

HBr and its aqueous solution are frequently utilised as reagents in the production of bromide compounds. Sodium has a large reduction capacity as an alkali metal with a standard reduction potential of 2.71 volts for the Na+/Na pair.