Home
Chemical reactions
Sr(OH)2 + Na2SO4 💧→ SrSO4↓ + 2NaOH

Sr(OH)₂ + Na₂SO₄ 💧→ SrSO₄↓ + 2NaOH

Last updated: June 13, 2022

Reaction of strontium hydroxide and sodium sulfate: Sr(OH)₂Strontium hydroxide + Na₂SO₄Sodium sulfate
💧
⟶
SrSO₄↓Strontium sulfate + 2NaOHSodium hydroxide

The reaction of strontium hydroxide and sodium sulfate yields strontium sulfate and sodium hydroxide. This reaction is an acid-base reaction and is classified as follows:

Precipitation reaction

Table of contents

Reaction data

Reactants

Chemical formula	Name	Coefficient	Type	Type in general equation
Sr(OH)₂	Strontium hydroxide	1	Lewis acid	Soluble in water
Na₂SO₄	Sodium sulfate	1	Lewis base	Soluble in water

Products

Chemical formula	Name	Coefficient	Type	Type in general equation
SrSO₄	Strontium sulfate	1	Lewis conjugate	Very slightly soluble in water
NaOH	Sodium hydroxide	2	Non-redox product	–

Thermodynamic changes

Changes in standard condition (1)

Reaction of strontium hydroxide and sodium sulfate: Sr(OH)₂Crystalline solid + Na₂SO₄Crystalline solidorthorhombic
💧
⟶
SrSO₄↓Crystalline solid + 2NaOHCrystalline solid

	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	41.8	–	–	–
per 1 mol of Strontium hydroxide	41.8	–	–	–
per 1 mol of Sodium sulfate	41.8	–	–	–
per 1 mol of Strontium sulfate	41.8	–	–	–
per 1 mol of Sodium hydroxide	20.9	–	–	–

Changes in standard condition (2)

Reaction of strontium hydroxide and sodium sulfate: Sr(OH)₂Crystalline solid + Na₂SO₄Crystalline solidorthorhombic
💧
⟶
SrSO₄↓Crystalline solidprecipitated + 2NaOHCrystalline solid

	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	45.1	–	–	–
per 1 mol of Strontium hydroxide	45.1	–	–	–
per 1 mol of Sodium sulfate	45.1	–	–	–
per 1 mol of Strontium sulfate	45.1	–	–	–
per 1 mol of Sodium hydroxide	22.6	–	–	–

Changes in standard condition (3)

Reaction of strontium hydroxide and sodium sulfate: Sr(OH)₂Crystalline solid + Na₂SO₄Crystalline solidmetastable
💧
⟶
SrSO₄↓Crystalline solid + 2NaOHCrystalline solid

	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 Strontium hydroxide	–	–	–	–
per 1 mol of Sodium sulfate	–	–	–	–
per 1 mol of Strontium sulfate	–	–	–	–
per 1 mol of Sodium hydroxide	–	–	–	–

Changes in standard condition (4)

Reaction of strontium hydroxide and sodium sulfate: Sr(OH)₂Crystalline solid + Na₂SO₄Crystalline solidmetastable
💧
⟶
SrSO₄↓Crystalline solidprecipitated + 2NaOHCrystalline solid

	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 Strontium hydroxide	–	–	–	–
per 1 mol of Sodium sulfate	–	–	–	–
per 1 mol of Strontium sulfate	–	–	–	–
per 1 mol of Sodium hydroxide	–	–	–	–

Changes in aqueous solution (1)

Reaction of strontium hydroxide and sodium sulfate: Sr(OH)₂Crystalline solid + Na₂SO₄Ionized aqueous solution
💧
⟶
SrSO₄↓Crystalline solid + 2NaOHIonized aqueous solution

	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	−44.8	–	–	–
per 1 mol of Strontium hydroxide	−44.8	–	–	–
per 1 mol of Sodium sulfate	−44.8	–	–	–
per 1 mol of Strontium sulfate	−44.8	–	–	–
per 1 mol of Sodium hydroxide	−22.4	–	–	–

Changes in aqueous solution (2)

Reaction of strontium hydroxide and sodium sulfate: Sr(OH)₂Crystalline solid + Na₂SO₄Ionized aqueous solution
💧
⟶
SrSO₄↓Crystalline solidprecipitated + 2NaOHIonized aqueous solution

	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	−41.5	–	–	–
per 1 mol of Strontium hydroxide	−41.5	–	–	–
per 1 mol of Sodium sulfate	−41.5	–	–	–
per 1 mol of Strontium sulfate	−41.5	–	–	–
per 1 mol of Sodium hydroxide	−20.8	–	–	–

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
Sr(OH)₂ (cr)	-959.0^[1]	–	–	–
Sr(OH)₂ (g)	-565^[1]	–	–	–
Sr(OH)₂ (cr) 1 hydrate	-1264.8^[1]	–	–	–
Sr(OH)₂ (cr) 8 hydrate	-3352.2^[1]	–	–	–
Na₂SO₄ (cr) orthorhombic	-1387.08^[1]	-1270.16^[1]	149.58^[1]	128.20^[1]
Na₂SO₄ (cr) metastable	–	–	154.934^[1]	129.29^[1]
Na₂SO₄ (ai)	-1389.51^[1]	-1268.36^[1]	138.1^[1]	-201^[1]
Na₂SO₄ (cr) 10 hydrate	-4327.26^[1]	-3646.85^[1]	592.0^[1]	–

* (cr):Crystalline solid, (g):Gas, (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
SrSO₄ (cr)	-1453.1^[1]	-1340.9^[1]	117^[1]	–
SrSO₄ (cr) precipitated	-1449.8^[1]	–	–	–
SrSO₄ (ai)	-1455.07^[1]	-1304.00^[1]	-12.6^[1]	–
NaOH (cr)	-425.609^[1]	-379.494^[1]	64.455^[1]	59.54^[1]
NaOH (g)	-207.1^[1]	-210.0^[1]	228.43^[1]	48.37^[1]
NaOH (ai)	-470.114^[1]	-419.150^[1]	48.1^[1]	-102.1^[1]
NaOH (cr) 1 hydrate	-734.543^[1]	-629.338^[1]	99.50^[1]	90.17^[1]
NaOH (l) 2 hydrate	-1019.076^[1]	-873.091^[1]	195.979^[1]	239.41^[1]
NaOH (l) 3.5 hydrate	-1459.798^[1]	-1236.356^[1]	286.089^[1]	354.43^[1]
NaOH (l) 4 hydrate	-1605.15^[1]	-1356.64^[1]	318.70^[1]	–
NaOH (l) 5 hydrate	-1894.31^[1]	-1596.34^[1]	386.06^[1]	–
NaOH (l) 7 hydrate	-2469.02^[1]	-2073.80^[1]	526.31^[1]	–

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

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

Sr(OH)2 + Na2SO4 💧→ SrSO4↓ + 2NaOH

Reaction data

Chemical equation

General equation

Oxidation state of each atom