15 Facts on HF + MgSiO3: What, How to balance & FAQs

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HF is a weak acid and MgSiO3 is a combination of silicon and magnesium oxide. Let us examine how HF reacts with MgSiO3 using the information in this article.

Hydrogen fluoride is dissolved in water to form hydrofluoric acid (HF) and its molar mass is 20.01 g/mol. For old cooking oils to last longer, free fatty acids and other polar components are frequently removed using MgSiO3.

Let us discuss the interaction of HF with MgSiO3 with the aid of this article.

What is the product of HF + MgSiO3

magnesium fluoride ( MgF2) and metasilicic acid (H2SiO3) are the products of the reaction HF + MgSiO3 .

MgSiO3(s) + HF(aq) → MgF2(s) + H2SiO3(s)

What type of reaction is HF + MgSiO3

The reaction of HF + MgSiO3 is a double displacement reaction (metathesis) because both interacting compounds exchange their ions or radicals to form two new compounds.

How to balance HF + MgSiO3

  • The unbalanced equation is as follows: MgSiO3(s) + HF(aq) → MgF2(s) + H2SiO3(s)
  • For a chemical equation to be balanced, there must be an equal number of atoms on both sides.
  • Reactant side: Mg=1, Si=1,O=3, H=1, F=1
  • Product side: Mg=1, Si=1, O=3, H=2, F=2
  • To balance the equation we will multiply 2 with HF; H=2 and F=2 on the reactant side. 
  • MgSiO3(s) + 2HF(aq) → MgF2(s) + H2SiO3(s), balanced chemical equation.

HF + MgSiO3 Titration

The titration of HF and MgSiO3 is not possible because HF is a weak acid and MgSiO3 demonstrates moderate basicity as well as acidic properties.

HF + MgSiO3 Net ionic equation

The net ionic equation for the reaction is:

MgSiO3(s) + 2H+(aq) + 2F– (aq) → MgF2(s) + H2SiO3(s)

  • First, the balanced chemical equation should be written:
  • MgSiO3(s) + 2HF(aq) → MgF2(s) + H2SiO3(s)
  • Each soluble ionic compound (those with a (aq)) is converted into its corresponding ion.
  • MgSiO3(s) + 2H+(aq) + 2F– (aq) → MgF2(s) + H2SiO3(s)
  • On both sides of the ionic equation, eliminate the spectator ions. As a net ionic equation, take note of the remaining substance.

Is HF + MgSiO3 Conjugate pairs

The reaction of HF and MgSiO3 do not form conjugate acid-base pairs as HF is a weak acid which does not 100% dissociate in solution and MgSiO3 does not 100% ionise in the solution. 

HF and MgSiO3 intermolecular forces

The intermolecular forces betweem HF and MgSiO3 are as follows:

  • The primary intermolecular force in HF is hydrogen bonding, but it also possesses dipole-dipole interactions because the difference in electronegativity between the H and F atoms creates a dipole moment. The London dispersion force is also present in the molecule HF.
  • An ionic bond exists between the MgF2 molecules.

HF and MgSiO3 Reaction enthalpy

The standard reaction enthalpy for HF and MgSiO3 is -123.65KJ/mol. It is calculated using the information given in the table.

CompoundsMolesStandard Enthalpy of formation (ΔHͦf) in KJ/mol
HF(aq)2-320.13
MgSiO3(s)1-1549
MgF2(s)1-1124.24
H2SiO3(s)1-1188.67
Reaction Enthalpy

Sum of enthalpies of reactant (ΔHͦf) = 2(-320.13) + (-1549)

                                                          = (-640.26) + (-1549) = -2189.26

Sum of enthalpies of product (ΔHͦf) = (-1124.24) + (-1188.67) = -2312.91

Reaction Enthalpy = ΣΔHͦf (product) – ΣΔHͦf (reactant)

                               = (-2312.91) – (-2189.26) = -123.65

Is HF and MgSiO3 a Buffer solution

The reaction of HF and MgSiO3 is not a buffer solution because HF is a weak acid and MgSiO3 shows moderate basicity as well as acidic properties.

Is HF and MgSiO3 a complete reaction

The reaction of HF and MgSiO3 is a complete reaction. One mole of MgSiO3(s) reacts with two mole of HF(aq) acid to form one mole of H2SiO3(s) acid and one mole of MgF2(s). 

Is HF and MgSiO3 an Exothermic or Endothermic reaction

The reaction between HF and MgSiO3 is an exothermic reaction because the standard reaction enthalpy is negative, releasing heat during the reaction.

Is HF and MgSiO3 a Redox reaction

The reaction of HF and MgSiO3 is not a redox reaction. The oxidation states of elements did not change during the reaction.

redox rxn wp
Redox reaction

Is HF and MgSiO3 a Precipitation reaction

The reaction of HF and MgSiO3 is a precipitation reaction as MgF2 and H2SiO3 are the solid products formed during the reaction.

Is HF and MgSiO3 a Reversible or Irreversible reaction

The reaction of HF and MgSiO3 is an irreversible reaction. Because the resulting solid product cannot be converted back into their reactant.  

Is HF and MgSiO3 a Displacement reaction

The reaction of HF and MgSiO3 is a double displacement reaction (metathesis), where H+ displaces Mg2+ ion in MgSiO3.

1 wp
Redox reaction

Conclusion

MgSiO3 is a common silicate mineral with a density of 4.103 g/cm3 and a molar mass of 100.39 g/mol. The mixture MgSiO3 and HF yields MgF2 which is frequently employed in the ceramics industry, the manufacture of ceramic frites and enamels, the nuclear industry, and for surface.