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Chemical reactions
ZnCl2 + 2CsOH → 2CsCl + Zn(OH)2↓

ZnCl₂ + 2CsOH → 2CsCl + Zn(OH)₂↓

Last updated: June 13, 2022

Reaction of zinc chloride and caesium hydroxide: ZnCl₂Zinc chloride + 2CsOHCaesium hydroxide
⟶
2CsClCaesium chloride + Zn(OH)₂↓Zinc hydroxide

The reaction of zinc chloride and caesium hydroxide yields caesium chloride and zinc hydroxide. This reaction is an acid-base reaction and is classified as follows:

Table of contents

Reaction data

Reactants

Chemical formula	Name	Coefficient	Type	Type in general equation
ZnCl₂	Zinc chloride	1	Brønsted acid Lewis acid	Salt of weak base Very soluble in water
CsOH	Caesium hydroxide	2	Brønsted base Lewis base	Strong base Very soluble in water

Products

Chemical formula	Name	Coefficient	Type	Type in general equation
CsCl	Caesium chloride	2	Conjugate acid Non-redox product	Salt of strong base –
Zn(OH)₂	Zinc hydroxide	1	Conjugate base Lewis conjugate	Weak base Insoluble in water

Thermodynamic changes

Changes in standard condition (1)

Reaction of zinc chloride and caesium hydroxide: ZnCl₂Crystalline solid + 2CsOHCrystalline solid
⟶
2CsClCrystalline solid + Zn(OH)₂↓Crystalline solidγ

	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 Zinc chloride	–	–	–	–
per 1 mol of Caesium hydroxide	–	–	–	–
per 1 mol of Caesium chloride	–	–	–	–
per 1 mol of Zinc hydroxide	–	–	–	–

Changes in standard condition (2)

Reaction of zinc chloride and caesium hydroxide: ZnCl₂Crystalline solid + 2CsOHCrystalline solid
⟶
2CsClCrystalline solid + Zn(OH)₂↓Crystalline solidβ

	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	−278.48	–	–	–
per 1 mol of Zinc chloride	−278.48	–	–	–
per 1 mol of Caesium hydroxide	−139.24	–	–	–
per 1 mol of Caesium chloride	−139.24	–	–	–
per 1 mol of Zinc hydroxide	−278.48	–	–	–

Changes in standard condition (3)

Reaction of zinc chloride and caesium hydroxide: ZnCl₂Crystalline solid + 2CsOHCrystalline solid
⟶
2CsClCrystalline solid + Zn(OH)₂↓Crystalline solidε

	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	−279.82	–	–	–
per 1 mol of Zinc chloride	−279.82	–	–	–
per 1 mol of Caesium hydroxide	−139.91	–	–	–
per 1 mol of Caesium chloride	−139.91	–	–	–
per 1 mol of Zinc hydroxide	−279.82	–	–	–

Changes in standard condition (4)

Reaction of zinc chloride and caesium hydroxide: ZnCl₂Crystalline solid + 2CsOHCrystalline solid
⟶
2CsClCrystalline solid + Zn(OH)₂↓Crystalline solidprecipitated

	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	−278.8	–	–	–
per 1 mol of Zinc chloride	−278.8	–	–	–
per 1 mol of Caesium hydroxide	−139.4	–	–	–
per 1 mol of Caesium chloride	−139.4	–	–	–
per 1 mol of Zinc hydroxide	−278.8	–	–	–

Changes in aqueous solution (1)

Reaction of zinc chloride and caesium hydroxide ◆ Δ_rG −61.21 kJ/mol K 5.29 × 10¹⁰ pK −10.72: ZnCl₂Ionized aqueous solution + 2CsOHIonized aqueous solution
⟶
2CsClIonized aqueous solution + Zn(OH)₂↓Un-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	–	−61.21	–	–
per 1 mol of Zinc chloride	–	−61.21	–	–
per 1 mol of Caesium hydroxide	–	−30.61	–	–
per 1 mol of Caesium chloride	–	−30.61	–	–
per 1 mol of Zinc hydroxide	–	−61.21	–	–

Changes in aqueous solution (2)

Reaction of zinc chloride and caesium hydroxide ◆ Δ_rG −92.29 kJ/mol K 1.47 × 10¹⁶ pK −16.17: ZnCl₂Ionized aqueous solution + 2CsOHIonized aqueous solution
⟶
2CsClIonized aqueous solution + Zn(OH)₂↓Crystalline solidγ

	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	–	−92.29	–	–
per 1 mol of Zinc chloride	–	−92.29	–	–
per 1 mol of Caesium hydroxide	–	−46.15	–	–
per 1 mol of Caesium chloride	–	−46.15	–	–
per 1 mol of Zinc hydroxide	–	−92.29	–	–

Changes in aqueous solution (3)

Reaction of zinc chloride and caesium hydroxide ◆ Δ_rG −92.00 kJ/mol K 1.31 × 10¹⁶ pK −16.12: ZnCl₂Ionized aqueous solution + 2CsOHIonized aqueous solution
⟶
2CsClIonized aqueous solution + Zn(OH)₂↓Crystalline solidβ

	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	−28.04	−92.00	214.9	–
per 1 mol of Zinc chloride	−28.04	−92.00	214.9	–
per 1 mol of Caesium hydroxide	−14.02	−46.00	107.5	–
per 1 mol of Caesium chloride	−14.02	−46.00	107.5	–
per 1 mol of Zinc hydroxide	−28.04	−92.00	214.9	–

Changes in aqueous solution (4)

Reaction of zinc chloride and caesium hydroxide ◆ Δ_rG −93.55 kJ/mol K 2.45 × 10¹⁶ pK −16.39: ZnCl₂Ionized aqueous solution + 2CsOHIonized aqueous solution
⟶
2CsClIonized aqueous solution + Zn(OH)₂↓Crystalline solidε

	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	−29.38	−93.55	215.3	–
per 1 mol of Zinc chloride	−29.38	−93.55	215.3	–
per 1 mol of Caesium hydroxide	−14.69	−46.77	107.7	–
per 1 mol of Caesium chloride	−14.69	−46.77	107.7	–
per 1 mol of Zinc hydroxide	−29.38	−93.55	215.3	–

Changes in aqueous solution (5)

Reaction of zinc chloride and caesium hydroxide: ZnCl₂Ionized aqueous solution + 2CsOHIonized aqueous solution
⟶
2CsClIonized aqueous solution + Zn(OH)₂↓Crystalline solidprecipitated

	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	−28.3	–	–	–
per 1 mol of Zinc chloride	−28.3	–	–	–
per 1 mol of Caesium hydroxide	−14.2	–	–	–
per 1 mol of Caesium chloride	−14.2	–	–	–
per 1 mol of Zinc hydroxide	−28.3	–	–	–

Changes in aqueous solution (6)

Reaction of zinc chloride and caesium hydroxide ◆ Δ_rG −67.0 kJ/mol K 5.47 × 10¹¹ pK −11.74: ZnCl₂Un-ionized aqueous solution + 2CsOHIonized aqueous solution
⟶
2CsClIonized aqueous solution + Zn(OH)₂↓Un-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	–	−67.0	–	–
per 1 mol of Zinc chloride	–	−67.0	–	–
per 1 mol of Caesium hydroxide	–	−33.5	–	–
per 1 mol of Caesium chloride	–	−33.5	–	–
per 1 mol of Zinc hydroxide	–	−67.0	–	–

Changes in aqueous solution (7)

Reaction of zinc chloride and caesium hydroxide ◆ Δ_rG −98.1 kJ/mol K 1.54 × 10¹⁷ pK −17.19: ZnCl₂Un-ionized aqueous solution + 2CsOHIonized aqueous solution
⟶
2CsClIonized aqueous solution + Zn(OH)₂↓Crystalline solidγ

	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	–	−98.1	–	–
per 1 mol of Zinc chloride	–	−98.1	–	–
per 1 mol of Caesium hydroxide	–	−49.0	–	–
per 1 mol of Caesium chloride	–	−49.0	–	–
per 1 mol of Zinc hydroxide	–	−98.1	–	–

Changes in aqueous solution (8)

Reaction of zinc chloride and caesium hydroxide ◆ Δ_rG −97.8 kJ/mol K 1.36 × 10¹⁷ pK −17.13: ZnCl₂Un-ionized aqueous solution + 2CsOHIonized aqueous solution
⟶
2CsClIonized aqueous solution + Zn(OH)₂↓Crystalline solidβ

	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	–	−97.8	–	–
per 1 mol of Zinc chloride	–	−97.8	–	–
per 1 mol of Caesium hydroxide	–	−48.9	–	–
per 1 mol of Caesium chloride	–	−48.9	–	–
per 1 mol of Zinc hydroxide	–	−97.8	–	–

Changes in aqueous solution (9)

Reaction of zinc chloride and caesium hydroxide ◆ Δ_rG −99.4 kJ/mol K 2.59 × 10¹⁷ pK −17.41: ZnCl₂Un-ionized aqueous solution + 2CsOHIonized aqueous solution
⟶
2CsClIonized aqueous solution + Zn(OH)₂↓Crystalline solidε

	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	–	−99.4	–	–
per 1 mol of Zinc chloride	–	−99.4	–	–
per 1 mol of Caesium hydroxide	–	−49.7	–	–
per 1 mol of Caesium chloride	–	−49.7	–	–
per 1 mol of Zinc hydroxide	–	−99.4	–	–

Changes in aqueous solution (10)

Reaction of zinc chloride and caesium hydroxide: ZnCl₂Un-ionized aqueous solution + 2CsOHIonized aqueous solution
⟶
2CsClIonized aqueous solution + Zn(OH)₂↓Crystalline solidprecipitated

	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 Zinc chloride	–	–	–	–
per 1 mol of Caesium hydroxide	–	–	–	–
per 1 mol of Caesium chloride	–	–	–	–
per 1 mol of Zinc hydroxide	–	–	–	–

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
ZnCl₂ (cr)	-415.05^[1]	-369.398^[1]	111.46^[1]	71.34^[1]
ZnCl₂ (g)	-266.1^[1]	–	–	–
ZnCl₂ (ai)	-488.19^[1]	-409.50^[1]	0.8^[1]	-226^[1]
ZnCl₂ (ao)	–	-403.7^[1]	–	–
CsOH (cr)	-417.23^[1]	–	–	–
CsOH (g)	-247^[1]	-247^[1]	254.83^[1]	49.71^[1]
CsOH (ai)	-488.27^[1]	-449.25^[1]	122.30^[1]	–
CsOH (cr) 1 hydrate	-754.04^[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
CsCl (cr)	-443.04^[1]	-414.53^[1]	101.17^[1]	52.47^[1]
CsCl (g)	-240.20^[1]	-257.80^[1]	255.96^[1]	36.94^[1]
CsCl (ai)	-425.43^[1]	-423.24^[1]	189.54^[1]	-146.9^[1]
Zn(OH)₂ (cr) γ	–	-553.81^[1]	–	–
Zn(OH)₂ (cr) β	-641.91^[1]	-553.52^[1]	81.2^[1]	–
Zn(OH)₂ (cr) ε	-643.25^[1]	-555.07^[1]	81.6^[1]	72.4^[1]
Zn(OH)₂ (cr) precipitated	-642.2^[1]	–	–	–
Zn(OH)₂ (ai)	-613.88^[1]	-461.56^[1]	-133.5^[1]	-251^[1]
Zn(OH)₂ (ao)	–	-522.73^[1]	–	–