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ZnI2 + Cs2CO3 💧→ ZnCO3↓ + 2CsI

ZnI₂ + Cs₂CO₃ 💧→ ZnCO₃↓ + 2CsI

Last updated: June 13, 2022

Reaction of zinc iodide and caesium carbonate: ZnI₂Zinc iodide + Cs₂CO₃Caesium carbonate
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ZnCO₃↓Zinc carbonate + 2CsICaesium iodide

The reaction of zinc iodide and caesium carbonate yields zinc carbonate and caesium iodide. 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
ZnI₂	Zinc iodide	1	Lewis acid	Very soluble in water
Cs₂CO₃	Caesium carbonate	1	Lewis base	Very soluble in water

Products

Chemical formula	Name	Coefficient	Type	Type in general equation
ZnCO₃	Zinc carbonate	1	Lewis conjugate	Very slightly soluble in water
CsI	Caesium iodide	2	Non-redox product	–

Thermodynamic changes

Changes in standard condition

Reaction of zinc iodide and caesium carbonate ◆ Δ_rG −149.4 kJ/mol K 1.49 × 10²⁶ pK −26.17: ZnI₂Crystalline solid + Cs₂CO₃Crystalline solid
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ZnCO₃↓Crystalline solid + 2CsICrystalline 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	−158.3	−149.4	−37.1	–
per 1 mol of Zinc iodide	−158.3	−149.4	−37.1	–
per 1 mol of Caesium carbonate	−158.3	−149.4	−37.1	–
per 1 mol of Zinc carbonate	−158.3	−149.4	−37.1	–
per 1 mol of Caesium iodide	−79.15	−74.70	−18.6	–

Changes in aqueous solution (1)

Reaction of zinc iodide and caesium carbonate ◆ Δ_rG −56.65 kJ/mol K 8.41 × 10⁹ pK −9.92: ZnI₂Ionized aqueous solution + Cs₂CO₃Ionized aqueous solution
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ZnCO₃↓Crystalline solid + 2CsIIonized 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	18.24	−56.65	251.3	–
per 1 mol of Zinc iodide	18.24	−56.65	251.3	–
per 1 mol of Caesium carbonate	18.24	−56.65	251.3	–
per 1 mol of Zinc carbonate	18.24	−56.65	251.3	–
per 1 mol of Caesium iodide	9.120	−28.32	125.7	–

Changes in aqueous solution (2)

Reaction of zinc iodide and caesium carbonate ◆ Δ_rG −66.3 kJ/mol K 4.12 × 10¹¹ pK −11.62: ZnI₂Un-ionized aqueous solution + Cs₂CO₃Ionized aqueous solution
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ZnCO₃↓Crystalline solid + 2CsIIonized 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	–	−66.3	–	–
per 1 mol of Zinc iodide	–	−66.3	–	–
per 1 mol of Caesium carbonate	–	−66.3	–	–
per 1 mol of Zinc carbonate	–	−66.3	–	–
per 1 mol of Caesium iodide	–	−33.1	–	–

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
ZnI₂ (cr)	-208.03^[1]	-208.95^[1]	161.1^[1]	–
ZnI₂ (ai)	-264.26^[1]	-250.20^[1]	110.5^[1]	-238^[1]
ZnI₂ (ao)	–	-240.6^[1]	–	–
Cs₂CO₃ (cr)	-1139.7^[1]	-1054.3^[1]	204.47^[1]	123.85^[1]
Cs₂CO₃ (ai)	-1193.70^[1]	-1111.85^[1]	209.2^[1]	–
Cs₂CO₃ (cr) 3 hydrate	-2048.1^[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
ZnCO₃ (cr)	-812.78^[1]	-731.52^[1]	82.4^[1]	79.71^[1]
ZnCO₃ (cr) 1 hydrate	–	-970.6^[1]	–	–
CsI (cr)	-346.60^[1]	-340.58^[1]	123.05^[1]	52.80^[1]
CsI (g)	-151.9^[1]	-191.2^[1]	275.29^[1]	37.45^[1]
CsI (ai)	-313.47^[1]	-343.59^[1]	244.3^[1]	-152.7^[1]

* (cr):Crystalline solid, (g):Gas, (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

Δ_rG	−149.4 kJ/mol
K	1.49 × 10²⁶
pK	−26.17

Δ_rG	−56.65 kJ/mol
K	8.41 × 10⁹
pK	−9.92

Δ_rG	−66.3 kJ/mol
K	4.12 × 10¹¹
pK	−11.62

ZnI2 + Cs2CO3 💧→ ZnCO3↓ + 2CsI

Reaction data

Chemical equation

General equation

Oxidation state of each atom