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4NiSO4 + 2Na[Al(OH)4] 💧→ 4Ni(OH)2↓ + Na2SO4 + Al2(SO4)3

4NiSO₄ + 2Na[Al(OH)₄] 💧→ 4Ni(OH)₂↓ + Na₂SO₄ + Al₂(SO₄)₃

Last updated: June 13, 2022

Reaction of nickel(II) sulfate and sodium tetrahydroxydoaluminate: 4NiSO₄Nickel(II) sulfate + 2Na[Al(OH)₄]Sodium tetrahydroxydoaluminate
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4Ni(OH)₂↓Nickel(II) hydroxide + Na₂SO₄Sodium sulfate + Al₂(SO₄)₃Aluminium sulfate

The reaction of nickel(II) sulfate and sodium tetrahydroxydoaluminate yields nickel(II) hydroxide, sodium sulfate, and aluminium sulfate (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 nickel(II) sulfate and sodium tetrahydroxydoaluminate: 4NiSO₄Nickel(II) sulfate + 2Na[Al(OH)₄]Sodium tetrahydroxydoaluminate
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4Ni(OH)₂↓Nickel(II) hydroxide + Na₂SO₄Sodium sulfate + Al₂(SO₄)₃Aluminium sulfate

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 nickel(II) sulfate and sodium tetrahydroxydoaluminate

Reactants

Chemical formula	Name	Coefficient	Type	Type in general equation
NiSO₄	Nickel(II) sulfate	4	Lewis acid	Very soluble in water
Na[Al(OH)₄]	Sodium tetrahydroxydoaluminate	2	Lewis base	Very soluble in water

Products

Chemical formula	Name	Coefficient	Type	Type in general equation
Ni(OH)₂	Nickel(II) hydroxide	4	Lewis conjugate	Very slightly soluble in water
Na₂SO₄	Sodium sulfate	1	Non-redox product	–
Al₂(SO₄)₃	Aluminium sulfate	1	Non-redox product	–

Thermodynamic changes

Changes in standard condition (1)

Reaction of nickel(II) sulfate and sodium tetrahydroxydoaluminate: 4NiSO₄Ionized aqueous solution + 2Na[Al(OH)₄]Ionized aqueous solution
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4Ni(OH)₂↓Crystalline solid + Na₂SO₄Ionized aqueous solution + Al₂(SO₄)₃Aqueous 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	54.9	–	–	–
per 1 mol of Nickel(II) sulfate	13.7	–	–	–
per 1 mol of Sodium tetrahydroxydoaluminate	27.4	–	–	–
per 1 mol of Nickel(II) hydroxide	13.7	–	–	–
per 1 mol of Sodium sulfate	54.9	–	–	–
per 1 mol of Aluminium sulfate	54.9	–	–	–

Changes in standard condition (2)

Reaction of nickel(II) sulfate and sodium tetrahydroxydoaluminate ◆ Δ_rG 33 kJ/mol K 0.17 × 10⁻⁵ pK 5.78: 4NiSO₄Ionized aqueous solution + 2Na[Al(OH)₄]Ionized aqueous solution
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4Ni(OH)₂↓Crystalline solid + Na₂SO₄Ionized aqueous solution + Al₂(SO₄)₃Ionized 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	39	33	18	–
per 1 mol of Nickel(II) sulfate	9.8	8.3	4.5	–
per 1 mol of Sodium tetrahydroxydoaluminate	20	17	9.0	–
per 1 mol of Nickel(II) hydroxide	9.8	8.3	4.5	–
per 1 mol of Sodium sulfate	39	33	18	–
per 1 mol of Aluminium sulfate	39	33	18	–

Changes in standard condition (3)

Reaction of nickel(II) sulfate and sodium tetrahydroxydoaluminate: 4NiSO₄Un-ionized aqueous solution + 2Na[Al(OH)₄]Ionized aqueous solution
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4Ni(OH)₂↓Crystalline solid + Na₂SO₄Ionized aqueous solution + Al₂(SO₄)₃Aqueous 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	−0.7	–	–	–
per 1 mol of Nickel(II) sulfate	−0.17	–	–	–
per 1 mol of Sodium tetrahydroxydoaluminate	−0.35	–	–	–
per 1 mol of Nickel(II) hydroxide	−0.17	–	–	–
per 1 mol of Sodium sulfate	−0.70	–	–	–
per 1 mol of Aluminium sulfate	−0.70	–	–	–

Changes in standard condition (4)

Reaction of nickel(II) sulfate and sodium tetrahydroxydoaluminate ◆ Δ_rG 85 kJ/mol K 0.13 × 10⁻¹⁴ pK 14.89: 4NiSO₄Un-ionized aqueous solution + 2Na[Al(OH)₄]Ionized aqueous solution
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4Ni(OH)₂↓Crystalline solid + Na₂SO₄Ionized aqueous solution + Al₂(SO₄)₃Ionized 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	−17	85	−345	–
per 1 mol of Nickel(II) sulfate	−4.3	21	−86.3	–
per 1 mol of Sodium tetrahydroxydoaluminate	−8.5	43	−173	–
per 1 mol of Nickel(II) hydroxide	−4.3	21	−86.3	–
per 1 mol of Sodium sulfate	−17	85	−345	–
per 1 mol of Aluminium sulfate	−17	85	−345	–

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
NiSO₄ (cr)	-872.91^[1]	-759.7^[1]	92^[1]	138^[1]
NiSO₄ (ai)	-963.2^[1]	-790.3^[1]	-108.8^[1]	–
NiSO₄ (ao)	-949.3^[1]	-803.3^[1]	-18.0^[1]	–
NiSO₄ (cr) 4 hydrate	-2104.1^[1]	–	–	–
NiSO₄ (cr) 6 hydrate α, tetragonal, green	-2682.82^[1]	-2224.61^[1]	334.47^[1]	327.86^[1]
NiSO₄ (cr) 6 hydrate β, monoclinic, blue	-2672.3^[1]	–	–	–
NiSO₄ (cr) 7 hydrate	-2976.33^[1]	-2461.83^[1]	378.94^[1]	364.59^[1]
Na[Al(OH)₄] (ai)	-1742.6^[1]	-1567.2^[1]	161.9^[1]	–

* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-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
Ni(OH)₂ (cr)	-529.7^[1]	-447.2^[1]	88^[1]	–
Ni(OH)₂ (ai)	-513.8^[1]	-360.2^[1]	-150.2^[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]	–
Al₂(SO₄)₃ (cr)	-3440.84^[1]	-3099.94^[1]	239.3^[1]	259.41^[1]
Al₂(SO₄)₃ (ai)	-3791^[1]	-3205^[1]	-583.2^[1]	–
Al₂(SO₄)₃ (aq)	-3774.8^[1]	–	–	–
Al₂(SO₄)₃ (cr) 6 hydrate	-5311.71^[1]	-4622.08^[1]	469.0^[1]	492.9^[1]
Al₂(SO₄)₃ (cr) 18 hydrate	-8878.9^[1]	–	–	–

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

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)
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