Calcium Carbonate and Hydrogen fluoride are inorganic compounds with chemical formulas, CaCO3 and HF, respectively. Let us explore more about the reaction between CaCO3 and HF.
HF is a weak acid and CaCO3 is neither acid nor base. In addition to being a food coloring and firming agent, it is a fertilizer. HF is a potent inorganic acid that is colorless and dissolves in water. HF has multiple applications in industries like electronics, glass etching, and fluorescent light bulbs.
In this article will learn how to balance the HF + CaCO3 chemical equation, intermolecular forces, and facts about the reaction enthalpy in this article.
What is the product of HF and CaCO3?
Calcium Fluoride, water (H2O) and Carbon Dioxide (CO2) gas are the products of HF +CaCO3.
2HF +CaCO3 = CO2 +CaF2 + H2O
What type of reaction is HF + CaCO3
HF +CaCO3 is an acid-base and neutralization reaction because a strong acid neutralizes a weak base to generate salt and water.
How to balance HF + CaCO3
The balanced chemical equation for the above-mentioned reactants is: 2HF +CaCO3 = CO2 +CaF2 + H2O
- The general equation is HF +CaCO3 = CO2 +CaF2 + H2O
- Next, check the number of atoms of Hydrogen, Fluorine, Calcium, Carbon, and Oxygen on both sides, which is as follows:
Element Name | Number of atoms (Reactant side) | Number of atoms (Product side) |
---|---|---|
Hydrogen | 1 | 2 |
Fluorine | 1 | 2 |
Calcium | 1 | 1 |
Carbon | 1 | 1 |
Oxygen | 3 | 3 |
- As we can see, we need to balance the number of atoms for Hydrogen and Fluorine element. Hence, we need to add “2” in front of the HF reactant.
- So, the balanced chemical equation is 2HF +CaCO3 = CO2 +CaF2 + H2O
HF + CaCO3 titration
The titration of HF and CaCO3 is not possible as CaCO3 is present in the form of metal salt which is a solid, hence cannot be titrated.
HF + CaCO3 net ionic equation
The ionic reaction of HF + CaCO3
F– + CO3 2- = F2– +OH– + CO32-
The net ionic equation for 2HF +CaCO3 = CO2 +CaF2 + H2O is written in three steps:
- Write the states and separate the soluble ionic compounds into their ions (these are the strong electrolytes denoted by an (aq)).
- Complete ionic equation: CaCO3 (s) + 2H+ (aq) + 2F– (aq) → Ca2+ (aq) + 2HF– (aq) + CO2 (g) + H2O (l)
- Finally, spectator ions are removed. These ions can be found on both sides of the ionic equation.
HF + CaCO3 conjugate pairs
HF + CaCO3 reaction has the following conjugate pairs,
- F– is the conjugate base of HF and it further does not have conjugate pair due to the absence of a proton.
- Conjugate acid-base pair for CaCO3 is not possible beacause of absence of proton.
HF and CaCO3 intermolecular forces
The forces between HF and CaCO3 are as follows:
• Forces acting on HF include permanent dipole-dipole, dispersion forces and hydrogen bonding.
• CaCO3 contains electrostatic attraction.
HF + CaCO3 reaction enthalpy
The reaction enthalpy of HF and CaCO3 is -258.27 kJ/mol. The standard enthalpy of formation is calculated as:
Molecules | Reaction Enthalpy (in kJ/mol) |
---|---|
CaCO3 | -1219.97 |
HF | -321.09 |
CaF2 | -1120 |
H2O | -285.83 |
CO2 | -393.5 |
Change in reaction enthalpy = Sum of enthalpies in product side – sum of enthalpies in reactant side.
Enthalpy change = (-1120-285.83-393.5) – (1219.97-321.09) = -258.27 kJ/mol.
Is HF + CaCO3 a buffer solution
HF + CaCO3 is not a buffer solution because HF is a strong acid.
Is HF + CaCO3 a complete reaction
HF + CaCO3 is a complete reaction as it dissociate completely in the solution.
Is HF + CaCO3 an exothermic reaction?
HF + CaCO3 is an exothermic reaction because the calculated enthalpy is negative which means heat is given out.
Is HF + CaCO3 a redox reaction
HF + CaCO3 is a redox reaction as the oxidation state of Hydrogen and Fluoride changes in the reaction.
Is HF + CaCO3 a precipitation reaction
HF + CaCO3 is not a precipitation reaction because there is a formation of precipitate CaF2.
Is HF + CaCO3 irreversible reaction?
HF + CaCO3 is an irreversible reaction because we can not reverse the direction of the reaction.
Is HF + CaCO3 displacement reaction
HF + CaCO3 is not a displacement reaction because new compound is formed without exchanging ions.
Conclusion
Hydrogen fluoride with calcium carbonate involves the formation of a neutral salt, CaF2, gas, and liquid water. CaF2 is used as dense aqueous solutions in drilling fluids, and as a food preservative. CO2 is a crucial industrial material used as an inert gas in pressurizing gas in an oil refinery.
Hi, I am Aarti. I am a post graduate in Medicinal chemistry and drug design from GGSIPU, New Delhi. I love all facets of chemistry, and I do think that it is present everywhere, so let us explore what chemistry is all about together. Let us connect through LinkedIn.