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2BaS + 3NH4HCO3 💧→ 2BaCO3↓ + HSCN + (NH4)2S + 3H2O

2BaS + 3NH₄HCO₃ 💧→ 2BaCO₃↓ + HSCN + (NH₄)₂S + 3H₂O

Last updated: June 13, 2022

Reaction of barium sulfide and ammonium hydrogencarbonate: 2BaSBarium sulfide + 3NH₄HCO₃Ammonium hydrogencarbonate
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2BaCO₃↓Barium carbonate + HSCNThiocyanic acid + (NH₄)₂SAmmonium sulfide + 3H₂OWater

The reaction of barium sulfide and ammonium hydrogencarbonate yields barium carbonate, thiocyanic acid, ammonium sulfide, and water (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:

Precipitation reaction

Table of contents

Reaction data

Chemical equation

Reaction of barium sulfide and ammonium hydrogencarbonate: 2BaSBarium sulfide + 3NH₄HCO₃Ammonium hydrogencarbonate
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2BaCO₃↓Barium carbonate + HSCNThiocyanic acid + (NH₄)₂SAmmonium sulfide + 3H₂OWater

General equation

Precipitation reaction: Miscible with water/Very soluble in water/Soluble in waterLewis acid + Miscible with water/Very soluble in water/Soluble in waterLewis base
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Insoluble in water/Very slightly soluble in water/Slightly soluble in waterLewis conjugate + Product(Non-redox product)

Oxidation state of each atom

Reaction of barium sulfide and ammonium hydrogencarbonate

Reactants

Chemical formula	Name	Coefficient	Type	Type in general equation
BaS	Barium sulfide	2	Lewis acid	Soluble in water
NH₄HCO₃	Ammonium hydrogencarbonate	3	Lewis base	Soluble in water

Products

Chemical formula	Name	Coefficient	Type	Type in general equation
BaCO₃	Barium carbonate	2	Lewis conjugate	Insoluble in water
HSCN	Thiocyanic acid	1	Non-redox product	–
(NH₄)₂S	Ammonium sulfide	1	Non-redox product	–
H₂O	Water	3	Non-redox product	–

Thermodynamic changes

Changes in aqueous solution (1)

Reaction of barium sulfide and ammonium hydrogencarbonate: 2BaSAqueous solution + 3NH₄HCO₃Ionized aqueous solution
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2BaCO₃↓Crystalline solid + HSCNUn-ionized aqueous solution + (NH₄)₂SIonized aqueous solution + 3H₂OLiquid

	Standard enthalpy of reaction Δ_rH° kJ · mol⁻¹	Standard Gibbs energy of reaction Δ_rG° kJ · mol⁻¹	Standard entropy of reaction Δ_rS° J · K⁻¹ · mol⁻¹	Standard heat capacity of reaction at constant pressure Δ_rC_p° J · K⁻¹ · mol⁻¹
per 1 mol of Equation	–	–	–	–
per 1 mol of Barium sulfide	–	–	–	–
per 1 mol of Ammonium hydrogencarbonate	–	–	–	–
per 1 mol of Barium carbonate	–	–	–	–
per 1 mol of Thiocyanic acid	–	–	–	–
per 1 mol of Ammonium sulfide	–	–	–	–
per 1 mol of Water	–	–	–	–

Changes in aqueous solution (2)

Reaction of barium sulfide and ammonium hydrogencarbonate: 2BaSAqueous solution + 3NH₄HCO₃Aqueous solution
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2BaCO₃↓Crystalline solid + HSCNUn-ionized aqueous solution + (NH₄)₂SIonized aqueous solution + 3H₂OLiquid

	Standard enthalpy of reaction Δ_rH° kJ · mol⁻¹	Standard Gibbs energy of reaction Δ_rG° kJ · mol⁻¹	Standard entropy of reaction Δ_rS° J · K⁻¹ · mol⁻¹	Standard heat capacity of reaction at constant pressure Δ_rC_p° J · K⁻¹ · mol⁻¹
per 1 mol of Equation	–	–	–	–
per 1 mol of Barium sulfide	–	–	–	–
per 1 mol of Ammonium hydrogencarbonate	–	–	–	–
per 1 mol of Barium carbonate	–	–	–	–
per 1 mol of Thiocyanic acid	–	–	–	–
per 1 mol of Ammonium sulfide	–	–	–	–
per 1 mol of Water	–	–	–	–

Changes in aqueous solution (3)

Reaction of barium sulfide and ammonium hydrogencarbonate: 2BaSAqueous solution + 3NH₄HCO₃Ionized aqueous solution
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⟶
2BaCO₃↓Crystalline solid + HSCNIonized aqueous solution + (NH₄)₂SIonized aqueous solution + 3H₂OLiquid

	Standard enthalpy of reaction Δ_rH° kJ · mol⁻¹	Standard Gibbs energy of reaction Δ_rG° kJ · mol⁻¹	Standard entropy of reaction Δ_rS° J · K⁻¹ · mol⁻¹	Standard heat capacity of reaction at constant pressure Δ_rC_p° J · K⁻¹ · mol⁻¹
per 1 mol of Equation	14.7	–	–	–
per 1 mol of Barium sulfide	7.35	–	–	–
per 1 mol of Ammonium hydrogencarbonate	4.90	–	–	–
per 1 mol of Barium carbonate	7.35	–	–	–
per 1 mol of Thiocyanic acid	14.7	–	–	–
per 1 mol of Ammonium sulfide	14.7	–	–	–
per 1 mol of Water	4.90	–	–	–

Changes in aqueous solution (4)

Reaction of barium sulfide and ammonium hydrogencarbonate: 2BaSAqueous solution + 3NH₄HCO₃Aqueous solution
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⟶
2BaCO₃↓Crystalline solid + HSCNIonized aqueous solution + (NH₄)₂SIonized aqueous solution + 3H₂OLiquid

	Standard enthalpy of reaction Δ_rH° kJ · mol⁻¹	Standard Gibbs energy of reaction Δ_rG° kJ · mol⁻¹	Standard entropy of reaction Δ_rS° J · K⁻¹ · mol⁻¹	Standard heat capacity of reaction at constant pressure Δ_rC_p° J · K⁻¹ · mol⁻¹
per 1 mol of Equation	6.3	–	–	–
per 1 mol of Barium sulfide	3.1	–	–	–
per 1 mol of Ammonium hydrogencarbonate	2.1	–	–	–
per 1 mol of Barium carbonate	3.1	–	–	–
per 1 mol of Thiocyanic acid	6.3	–	–	–
per 1 mol of Ammonium sulfide	6.3	–	–	–
per 1 mol of Water	2.1	–	–	–

Thermodynamic data of reactants

Chemical formula	Standard enthalpy of formation Δ_fH° kJ · mol⁻¹	Standard Gibbs energy of formation Δ_fG° kJ · mol⁻¹	Standard molar entropy S° J · K⁻¹ · mol⁻¹	Standard molar heat capacity at constant pressure C_p° J · K⁻¹ · mol⁻¹
BaS (cr)	-460^[1]	-456^[1]	78.2^[1]	49.37^[1]
BaS (g)	50^[1]	–	–	–
BaS (aq)	-493.3^[1]	–	–	–
NH₄HCO₃ (cr)	-849.4^[1]	-665.9^[1]	120.9^[1]	–
NH₄HCO₃ (ai)	-824.50^[1]	-666.07^[1]	204.6^[1]	–
NH₄HCO₃ (aq)	-821.7^[1]	–	–	–

* (cr):Crystalline solid, (g):Gas, (aq):Aqueous solution, (ai):Ionized aqueous solution

Thermodynamic data of products

Chemical formula	Standard enthalpy of formation Δ_fH° kJ · mol⁻¹	Standard Gibbs energy of formation Δ_fG° kJ · mol⁻¹	Standard molar entropy S° J · K⁻¹ · mol⁻¹	Standard molar heat capacity at constant pressure C_p° J · K⁻¹ · mol⁻¹
BaCO₃ (cr)	-1216.3^[1]	-1137.6^[1]	112.1^[1]	85.35^[1]
BaCO₃ (ai)	-1214.78^[1]	-1088.59^[1]	-47.3^[1]	–
HSCN (ai)	76.44^[1]	92.71^[1]	144.3^[1]	-40.2^[1]
HSCN (ao)	–	97.56^[1]	–	–
(NH₄)₂S (ai)	-231.8^[1]	-72.6^[1]	212.1^[1]	–
H₂O (cr)	–	–	–	–
H₂O (l)	-285.830^[1]	-237.129^[1]	69.91^[1]	75.291^[1]
H₂O (g)	-241.818^[1]	-228.572^[1]	188.825^[1]	33.577^[1]

* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (l):Liquid, (g):Gas

References

List of references

1
Janiel J. Reed (1989)
The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
https://doi.org/10.18434/M32124
National Institute of Standards and Technology (NIST)
Citation list