Home
Chemical reactions
SrCl2 + CdSO4 💧→ SrSO4↓ + CdCl2

SrCl₂ + CdSO₄ 💧→ SrSO₄↓ + CdCl₂

Last updated: June 13, 2022

Reaction of strontium chloride and cadmium sulfate: SrCl₂Strontium chloride + CdSO₄Cadmium sulfate
💧
⟶
SrSO₄↓Strontium sulfate + CdCl₂Cadmium chloride

The reaction of strontium chloride and cadmium sulfate yields strontium sulfate and cadmium chloride. 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
SrCl₂	Strontium chloride	1	Lewis acid	Very soluble in water
CdSO₄	Cadmium sulfate	1	Lewis base	Very soluble in water

Products

Chemical formula	Name	Coefficient	Type	Type in general equation
SrSO₄	Strontium sulfate	1	Lewis conjugate	Very slightly soluble in water
CdCl₂	Cadmium chloride	1	Non-redox product	–

Thermodynamic changes

Changes in standard condition (1)

Reaction of strontium chloride and cadmium sulfate ◆ Δ_rG −81.0 kJ/mol K 1.55 × 10¹⁴ pK −14.19: SrCl₂Crystalline solidα + CdSO₄Crystalline solid
💧
⟶
SrSO₄↓Crystalline solid + CdCl₂Crystalline 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	−82.4	−81.0	−6	–
per 1 mol of Strontium chloride	−82.4	−81.0	−6	–
per 1 mol of Cadmium sulfate	−82.4	−81.0	−6	–
per 1 mol of Strontium sulfate	−82.4	−81.0	−6	–
per 1 mol of Cadmium chloride	−82.4	−81.0	−6	–

Changes in standard condition (2)

Reaction of strontium chloride and cadmium sulfate: SrCl₂Crystalline solidα + CdSO₄Crystalline solid
💧
⟶
SrSO₄↓Crystalline solidprecipitated + CdCl₂Crystalline 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	−79.1	–	–	–
per 1 mol of Strontium chloride	−79.1	–	–	–
per 1 mol of Cadmium sulfate	−79.1	–	–	–
per 1 mol of Strontium sulfate	−79.1	–	–	–
per 1 mol of Cadmium chloride	−79.1	–	–	–

Changes in aqueous solution (1)

Reaction of strontium chloride and cadmium sulfate ◆ Δ_rG −36.3 kJ/mol K 2.29 × 10⁶ pK −6.36: SrCl₂Ionized aqueous solution + CdSO₄Crystalline solid
💧
⟶
SrSO₄↓Crystalline solid + CdCl₂Ionized 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	−49.9	−36.3	−47	–
per 1 mol of Strontium chloride	−49.9	−36.3	−47	–
per 1 mol of Cadmium sulfate	−49.9	−36.3	−47	–
per 1 mol of Strontium sulfate	−49.9	−36.3	−47	–
per 1 mol of Cadmium chloride	−49.9	−36.3	−47	–

Changes in aqueous solution (2)

Reaction of strontium chloride and cadmium sulfate ◆ Δ_rG −55.6 kJ/mol K 5.50 × 10⁹ pK −9.74: SrCl₂Ionized aqueous solution + CdSO₄Crystalline solid
💧
⟶
SrSO₄↓Crystalline solid + CdCl₂Un-ionized 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	−44.7	−55.6	35	–
per 1 mol of Strontium chloride	−44.7	−55.6	35	–
per 1 mol of Cadmium sulfate	−44.7	−55.6	35	–
per 1 mol of Strontium sulfate	−44.7	−55.6	35	–
per 1 mol of Cadmium chloride	−44.7	−55.6	35	–

Changes in aqueous solution (3)

Reaction of strontium chloride and cadmium sulfate: SrCl₂Ionized aqueous solution + CdSO₄Crystalline solid
💧
⟶
SrSO₄↓Crystalline solidprecipitated + CdCl₂Ionized 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	−46.6	–	–	–
per 1 mol of Strontium chloride	−46.6	–	–	–
per 1 mol of Cadmium sulfate	−46.6	–	–	–
per 1 mol of Strontium sulfate	−46.6	–	–	–
per 1 mol of Cadmium chloride	−46.6	–	–	–

Changes in aqueous solution (4)

Reaction of strontium chloride and cadmium sulfate: SrCl₂Ionized aqueous solution + CdSO₄Crystalline solid
💧
⟶
SrSO₄↓Crystalline solidprecipitated + CdCl₂Un-ionized 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	−41.4	–	–	–
per 1 mol of Strontium chloride	−41.4	–	–	–
per 1 mol of Cadmium sulfate	−41.4	–	–	–
per 1 mol of Strontium sulfate	−41.4	–	–	–
per 1 mol of Cadmium chloride	−41.4	–	–	–

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
SrCl₂ (cr) α	-828.9^[1]	-781.1^[1]	114.85^[1]	75.60^[1]
SrCl₂ (g)	-485.8^[1]	-496.2^[1]	310.81^[1]	55.77^[1]
SrCl₂ (ai)	-880.10^[1]	-821.91^[1]	80.3^[1]	–
SrCl₂ (cr) 1 hydrate	-1136.8^[1]	-1036.3^[1]	172^[1]	120.1^[1]
SrCl₂ (cr) 2 hydrate	-1438.0^[1]	-1281.8^[1]	218^[1]	160.2^[1]
SrCl₂ (cr) 6 hydrate	-2623.8^[1]	-2240.92^[1]	390.8^[1]	–
CdSO₄ (cr)	-933.28^[1]	-822.72^[1]	123.039^[1]	99.58^[1]
CdSO₄ (ai)	-985.16^[1]	-822.13^[1]	-53.1^[1]	–
CdSO₄ (cr) 1 hydrate	-1239.55^[1]	-1068.73^[1]	154.030^[1]	134.56^[1]
CdSO₄ (cr) 8/3 hydrate	-1729.4^[1]	-1465.141^[1]	229.630^[1]	213.26^[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]	–
CdCl₂ (cr)	-391.50^[1]	-343.93^[1]	115.27^[1]	74.68^[1]
CdCl₂ (ai)	-410.20^[1]	-340.068^[1]	39.7^[1]	–
CdCl₂ (ao)	-405.0^[1]	-359.29^[1]	121.8^[1]	–
CdCl₂ (cr) 1 hydrate	-688.44^[1]	-586.975^[1]	167.8^[1]	–
CdCl₂ (cr) 2.5 hydrate	-1131.94^[1]	-943.939^[1]	227.2^[1]	–

* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-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

Δ_rG	−81.0 kJ/mol
K	1.55 × 10¹⁴
pK	−14.19

Δ_rG	−36.3 kJ/mol
K	2.29 × 10⁶
pK	−6.36

Δ_rG	−55.6 kJ/mol
K	5.50 × 10⁹
pK	−9.74

SrCl2 + CdSO4 💧→ SrSO4↓ + CdCl2

Reaction data

Chemical equation

General equation

Oxidation state of each atom