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CaBr2 + CuSO4 💧→ CaSO4↓ + CuBr2

CaBr₂ + CuSO₄ 💧→ CaSO₄↓ + CuBr₂

Last updated: June 13, 2022

Reaction of calcium bromide and copper(II) sulfate: CaBr₂Calcium bromide + CuSO₄Copper(II) sulfate
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CaSO₄↓Calcium sulfate + CuBr₂Copper(II) bromide

The reaction of calcium bromide and copper(II) sulfate yields calcium sulfate and copper(II) bromide. 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
CaBr₂	Calcium bromide	1	Lewis acid	Very soluble in water
CuSO₄	Copper(II) sulfate	1	Lewis base	Soluble in water

Products

Chemical formula	Name	Coefficient	Type	Type in general equation
CaSO₄	Calcium sulfate	1	Lewis conjugate	Slightly soluble in water
CuBr₂	Copper(II) bromide	1	Non-redox product	–

Thermodynamic changes

Changes in standard condition (1)

Reaction of calcium bromide and copper(II) sulfate: CaBr₂Crystalline solid + CuSO₄Crystalline solid
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CaSO₄↓Crystalline solidinsoluble, anhydrite + CuBr₂Crystalline 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	−121.8	–	–	–
per 1 mol of Calcium bromide	−121.8	–	–	–
per 1 mol of Copper(II) sulfate	−121.8	–	–	–
per 1 mol of Calcium sulfate	−121.8	–	–	–
per 1 mol of Copper(II) bromide	−121.8	–	–	–

Changes in standard condition (2)

Reaction of calcium bromide and copper(II) sulfate: CaBr₂Crystalline solid + CuSO₄Crystalline solid
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CaSO₄↓Crystalline solidsoluble, α + CuBr₂Crystalline 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	−112.9	–	–	–
per 1 mol of Calcium bromide	−112.9	–	–	–
per 1 mol of Copper(II) sulfate	−112.9	–	–	–
per 1 mol of Calcium sulfate	−112.9	–	–	–
per 1 mol of Copper(II) bromide	−112.9	–	–	–

Changes in standard condition (3)

Reaction of calcium bromide and copper(II) sulfate: CaBr₂Crystalline solid + CuSO₄Crystalline solid
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CaSO₄↓Crystalline solidsoluble, β + CuBr₂Crystalline 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	−108.4	–	–	–
per 1 mol of Calcium bromide	−108.4	–	–	–
per 1 mol of Copper(II) sulfate	−108.4	–	–	–
per 1 mol of Calcium sulfate	−108.4	–	–	–
per 1 mol of Copper(II) bromide	−108.4	–	–	–

Changes in aqueous solution (1)

Reaction of calcium bromide and copper(II) sulfate: CaBr₂Ionized aqueous solution + CuSO₄Un-ionized aqueous solution
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CaSO₄↓Crystalline solidinsoluble, anhydrite + CuBr₂Crystalline 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 Calcium bromide	–	–	–	–
per 1 mol of Copper(II) sulfate	–	–	–	–
per 1 mol of Calcium sulfate	–	–	–	–
per 1 mol of Copper(II) bromide	–	–	–	–

Changes in aqueous solution (2)

Reaction of calcium bromide and copper(II) sulfate: CaBr₂Ionized aqueous solution + CuSO₄Un-ionized aqueous solution
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CaSO₄↓Crystalline solidsoluble, α + CuBr₂Crystalline 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 Calcium bromide	–	–	–	–
per 1 mol of Copper(II) sulfate	–	–	–	–
per 1 mol of Calcium sulfate	–	–	–	–
per 1 mol of Copper(II) bromide	–	–	–	–

Changes in aqueous solution (3)

Reaction of calcium bromide and copper(II) sulfate: CaBr₂Ionized aqueous solution + CuSO₄Un-ionized aqueous solution
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⟶
CaSO₄↓Crystalline solidsoluble, β + CuBr₂Crystalline 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 Calcium bromide	–	–	–	–
per 1 mol of Copper(II) sulfate	–	–	–	–
per 1 mol of Calcium sulfate	–	–	–	–
per 1 mol of Copper(II) bromide	–	–	–	–

Changes in aqueous solution (4)

Reaction of calcium bromide and copper(II) sulfate: CaBr₂Ionized aqueous solution + CuSO₄Crystalline solid
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⟶
CaSO₄↓Crystalline solidinsoluble, anhydrite + CuBr₂Crystalline 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	−18.6	–	–	–
per 1 mol of Calcium bromide	−18.6	–	–	–
per 1 mol of Copper(II) sulfate	−18.6	–	–	–
per 1 mol of Calcium sulfate	−18.6	–	–	–
per 1 mol of Copper(II) bromide	−18.6	–	–	–

Changes in aqueous solution (5)

Reaction of calcium bromide and copper(II) sulfate: CaBr₂Ionized aqueous solution + CuSO₄Crystalline solid
💧
⟶
CaSO₄↓Crystalline solidsoluble, α + CuBr₂Crystalline 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	−9.8	–	–	–
per 1 mol of Calcium bromide	−9.8	–	–	–
per 1 mol of Copper(II) sulfate	−9.8	–	–	–
per 1 mol of Calcium sulfate	−9.8	–	–	–
per 1 mol of Copper(II) bromide	−9.8	–	–	–

Changes in aqueous solution (6)

Reaction of calcium bromide and copper(II) sulfate: CaBr₂Ionized aqueous solution + CuSO₄Crystalline solid
💧
⟶
CaSO₄↓Crystalline solidsoluble, β + CuBr₂Crystalline 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	−5.3	–	–	–
per 1 mol of Calcium bromide	−5.3	–	–	–
per 1 mol of Copper(II) sulfate	−5.3	–	–	–
per 1 mol of Calcium sulfate	−5.3	–	–	–
per 1 mol of Copper(II) bromide	−5.3	–	–	–

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
CaBr₂ (cr)	-682.8^[1]	-663.6^[1]	130^[1]	–
CaBr₂ (g)	-398.3^[1]	–	–	–
CaBr₂ (ai)	-785.92^[1]	-761.49^[1]	111.7^[1]	–
CaBr₂ (cr) 6 hydrate	-2506.2^[1]	-2152.8^[1]	410^[1]	–
CuSO₄ (cr)	-771.36^[1]	-661.8^[1]	109^[1]	100.0^[1]
CuSO₄ (ai)	-844.50^[1]	-679.04^[1]	-79.5^[1]	–
CuSO₄ (ao)	–	-692.18^[1]	–	–
CuSO₄ (cr) 1 hydrate	-1085.83^[1]	-918.11^[1]	146.0^[1]	134^[1]
CuSO₄ (cr) 3 hydrate	-1684.31^[1]	-1399.96^[1]	221.3^[1]	205^[1]
CuSO₄ (cr) 5 hydrate	-2279.65^[1]	-1879.745^[1]	300.4^[1]	280^[1]

* (cr):Crystalline solid, (g):Gas, (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
CaSO₄ (cr) insoluble, anhydrite	-1434.11^[1]	-1321.79^[1]	106.7^[1]	99.66^[1]
CaSO₄ (cr) soluble, α	-1425.24^[1]	-1313.42^[1]	108.4^[1]	100.21^[1]
CaSO₄ (cr) soluble, β	-1420.80^[1]	-1308.98^[1]	108.4^[1]	99.04^[1]
CaSO₄ (ai)	-1452.10^[1]	-1298.10^[1]	-33.1^[1]	–
CaSO₄ (cr) 0.5 hydrate macrocrystalline, α	-1576.74^[1]	-1436.74^[1]	130.5^[1]	119.41^[1]
CaSO₄ (cr) 0.5 hydrate microcrystalline, β	-1574.65^[1]	-1435.78^[1]	134.3^[1]	124.22^[1]
CaSO₄ (cr) 2 hydrate selenite	-2022.63^[1]	-1797.28^[1]	194.1^[1]	186.02^[1]
CuBr₂ (cr)	-141.8^[1]	–	–	–
CuBr₂ (cr) 4 hydrate	-1326.3^[1]	–	–	–

* (cr):Crystalline solid, (ai):Ionized 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)
Citation list

CaBr2 + CuSO4 💧→ CaSO4↓ + CuBr2