15 Facts on HBr + Li2O: What, How To Balance & FAQs

Hydrogen bromide is responsible for free radical addition reactions which adds to alkenes. Let us know about the chemical reactivity of HBr and Li2O.

HBr is commonly used as a reagent in the formation of various bromide compounds. The reactions utilizing HBr are typically catalyzed by platinum. Li2O is very corrosive in nature and thus reacts with water.

The reactivity of HBr and Li2O produces desiccant useful in air conditioning systems. Thus, important reaction-based characteristics of the chemicals are explored as follows.

What is the product of HBr and Li2O?

HBr and Li2O interact to produce lithium bromide and water.

HBr + Li2O = LiBr + H2O

What type of reaction is HBr + Li2O?

HBr + Li2O is a acid base neutralization reaction where acid (HBr) and a base (Li2O) reacts to form a salt (LiBr) and water.

How to balance HBr + Li2O?

The algebraic methodology explained below can be followed to balance the reaction

HBr + Li2O = LiBr + H2O,

  • Each species present in the equation is marked with a respective variable (A, B, C, and D) to illustrate unknown coefficients.
  • A HBr + B Li2O = C LiBr + D H2O
  • Then, a suitable quantity thought of as the coefficient of reactants and product species, is applied to solve the equation.
  • Li = 2A = C, O = A = D, H = B = 2D, Br = B = C
  • The Gaussian elimination methodology is applied to ascertain all the variables and coefficients, and the outcomes are
  • A = 1, B = 2, C = 2, and D = 1
  • Hence, the overall balanced equation is,
  • 2 HBr + Li2O= 2 LiBr + H2O

HBr + Li2O titration

The given system is performed as like acid-base titration. The unknown concentration of Li2O can be calculated on titration with a standardized solution of HBr.

Apparatus

Burette, pipette, conical flask, funnel, stands, volumetric flask, beakers.

Indicator

Phenolphthalein is used as an indicator in the titration of Li2O with HBr.

Procedure

  • Firstly, an unknown HBr solution is standardized to use in the titration system.
  • Standardized HBr solution is then pipetted out in a conical flask.
  • Fill the burette with the unknown strength of Li2O.
  • Li2O solution is then added dropwise from the burette to the conical flask containing standard HBr solution.
  • To know the endpoint of the titration, indicator is added slightly to the conical flask, and the process is continued by adding the Li2O solution from the burette until the color of the solution turns light pink.
  • The strength of Li2O used is calculated using M1V1= M2V2
  • Where M1 = Molarity of HBr solution, V1 = Volume of HBr solution, M2 = Molarity of Li2O solution, V2 = Volume of Li2O solution

HBr + Li2O net ionic equation

The net ionic equation of HBr + Li2O is

 2 H+ (aq) + Li2O (s) = 2 Li+2  (aq) + H2O (l)

  • Write the balanced chemical equation and designate the physical states of reactants and products accordingly
  • 2 HBr (aq) + Li2O (s) = 2 LiBr (s) + H2O (l)
  • Now, strong acids, bases, and salts dissociate into ions whereas pure solid substances and molecules do not dissociate
  • Thus, the net ionic equation is
  • 2 H+ (aq) + Li2O (s) = 2 Li+2 (aq) + H2O (l)

HBr + Li2O conjugate pairs

HBr + Li2O reaction has the following conjugate pairs,

  • Conjugate pair of acid HBr is Br.
  • Conjugate pair of base Li2O is LiOH.

HBr and Li2O intermolecular forces

Intermolecular forces acting on HBr and Li2O are:

  • HBr molecules interact with each other using dipole-dipole interaction and London dispersion forces.
  • Li2O interacts forming ionic bonding.

HBr + Li2O reaction enthalpy

HBr + Li2O exhibits a reaction enthalpy of -575.76 kJ/mol.

Is HBr + Li2O a buffer solution?

HBr + Li2O cannot form a buffer because HBr is not a weak acid and Li2O is not a salt of the conjugate base of HBr.

Is HBr + Li2O a complete reaction?

HBr + Li2O is a complete reaction because the product (LiBr and water) formed in the reaction are highly stable.   

Is HBr + Li2O an exothermic or endothermic reaction?

HBr + Li2O is an exothermic reaction because the formation of an ionic substance (LiBr) releases heat.

Is HBr + Li2O a redox reaction?

HBr + Li2O is not a redox reaction because oxidation and reduction do not occur simultaneously. The oxidation state of H and Li is +1 on both the reactant and product sides.

HBr + Li2O a precipitation reaction?

HBr + Li2O is not a precipitation reaction because no precipitate is formed when the reaction ends. The product formed is a soluble salt.

Is HBr + Li2O reversible or irreversible reaction?

HBr + Li2O is an irreversible reaction because the products once formed cannot be changed back into the original reactants in the similar conditions.

Is HBr + Li2O displacement reaction?

HBr + Li2O is a double displacement reaction because both the anion component of the reactants is displaced with the respective cationic part.

Conclusions

The reactivity of HBr + Li2O forming an ionic salt, LiBr is a double displacement exothermic reaction. LiBr is a useful organic synthesis reagent with wide applications in hydroformylation catalysis. They are used in purification of prostaglandins.