CoCl2 + Ca(OH)2 → CaCl2 + Co(OH)2
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The reaction of cobalt(II) chloride and calcium hydroxide yields calcium chloride and cobalt(II) hydroxide. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of cobalt(II) chloride and calcium hydroxide
General equation
- Reaction of salt of weak base and strong base
- Salt of weak baseBrønsted acid + Strong baseBrønsted base ⟶ Salt of strong baseConjugate acid + Weak baseConjugate base + (H2O)
Oxidation state of each atom
- Reaction of cobalt(II) chloride and calcium hydroxide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CoCl2 | Cobalt(II) chloride | 1 | Brønsted acid | Salt of weak base |
| Ca(OH)2 | Calcium hydroxide | 1 | Brønsted base | Strong base |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaCl2 | Calcium chloride | 1 | Conjugate acid | Salt of strong base |
| Co(OH)2 | Cobalt(II) hydroxide | 1 | Conjugate base | Weak base |
Thermodynamic changes
Changes in standard condition (1)
- Reaction of cobalt(II) chloride and calcium hydroxide◆
ΔrG −29.9 kJ/mol K 1.73 × 105 pK −5.24
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | – | −29.9 | – | – |
per 1 mol of | – | −29.9 | – | – |
per 1 mol of | – | −29.9 | – | – |
per 1 mol of | – | −29.9 | – | – |
per 1 mol of | – | −29.9 | – | – |
Changes in standard condition (2)
- Reaction of cobalt(II) chloride and calcium hydroxide◆
ΔrG −34.1 kJ/mol K 9.42 × 105 pK −5.97
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | −36.9 | −34.1 | −9 | – |
per 1 mol of | −36.9 | −34.1 | −9 | – |
per 1 mol of | −36.9 | −34.1 | −9 | – |
per 1 mol of | −36.9 | −34.1 | −9 | – |
per 1 mol of | −36.9 | −34.1 | −9 | – |
Changes in standard condition (3)
- Reaction of cobalt(II) chloride and calcium hydroxide◆
ΔrG −37.9 kJ/mol K 4.36 × 106 pK −6.64
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | – | −37.9 | – | – |
per 1 mol of | – | −37.9 | – | – |
per 1 mol of | – | −37.9 | – | – |
per 1 mol of | – | −37.9 | – | – |
per 1 mol of | – | −37.9 | – | – |
Changes in aqueous solution (1)
- Reaction of cobalt(II) chloride and calcium hydroxide◆
ΔrG −22.5 kJ/mol K 8.75 × 103 pK −3.94
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | – | −22.5 | – | – |
per 1 mol of | – | −22.5 | – | – |
per 1 mol of | – | −22.5 | – | – |
per 1 mol of | – | −22.5 | – | – |
per 1 mol of | – | −22.5 | – | – |
Changes in aqueous solution (2)
- Reaction of cobalt(II) chloride and calcium hydroxide◆
ΔrG −50.9 kJ/mol K 8.27 × 108 pK −8.92
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | – | −50.9 | – | – |
per 1 mol of | – | −50.9 | – | – |
per 1 mol of | – | −50.9 | – | – |
per 1 mol of | – | −50.9 | – | – |
per 1 mol of | – | −50.9 | – | – |
Changes in aqueous solution (3)
- Reaction of cobalt(II) chloride and calcium hydroxide◆
ΔrG −55.1 kJ/mol K 4.50 × 109 pK −9.65
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | −38.2 | −55.1 | 55 | – |
per 1 mol of | −38.2 | −55.1 | 55 | – |
per 1 mol of | −38.2 | −55.1 | 55 | – |
per 1 mol of | −38.2 | −55.1 | 55 | – |
per 1 mol of | −38.2 | −55.1 | 55 | – |
Changes in aqueous solution (4)
- Reaction of cobalt(II) chloride and calcium hydroxide◆
ΔrG −58.9 kJ/mol K 2.08 × 1010 pK −10.32
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | – | −58.9 | – | – |
per 1 mol of | – | −58.9 | – | – |
per 1 mol of | – | −58.9 | – | – |
per 1 mol of | – | −58.9 | – | – |
per 1 mol of | – | −58.9 | – | – |
Thermodynamic data of reactants
| Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| CoCl2 (cr) | -312.5[1] | -269.8[1] | 109.16[1] | 78.49[1] |
| CoCl2 (ai) | -392.5[1] | -316.7[1] | 0[1] | – |
| CoCl2 (cr) 1 hydrate | -615[1] | – | – | – |
| CoCl2 (cr) 2 hydrate | -923.0[1] | -764.7[1] | 188[1] | – |
| CoCl2 (cr) 6 hydrate | -2115.4[1] | -1725.2[1] | 343[1] | – |
| Ca(OH)2 (cr) | -986.09[1] | -898.49[1] | 83.39[1] | 87.49[1] |
| Ca(OH)2 (g) | -544[1] | – | – | – |
| Ca(OH)2 (ai) | -1002.82[1] | -868.07[1] | -74.5[1] | – |
| Ca(OH)2 (cr) 2 hydrate | -1218.4[1] | – | – | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas
Thermodynamic data of products
| Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| CaCl2 (cr) | -795.8[1] | -748.1[1] | 104.6[1] | 72.59[1] |
| CaCl2 (g) | -471.5[1] | -479.24[1] | 290.27[1] | 59.33[1] |
| CaCl2 (ai) | -877.13[1] | -816.01[1] | 59.8[1] | – |
| CaCl2 (cr) 1 hydrate | -1109.2[1] | – | – | – |
| CaCl2 (cr) 2 hydrate | -1402.9[1] | – | – | – |
| CaCl2 (cr) 4 hydrate | -2009.6[1] | – | – | – |
| CaCl2 (cr) 6 hydrate | -2607.9[1] | – | – | – |
| Co(OH)2 (cr) blue, precipitated | – | -450.1[1] | – | – |
| Co(OH)2 (cr) pink, precipitated | -539.7[1] | -454.3[1] | 79[1] | – |
| Co(OH)2 (cr) pink, precipitated, aged | – | -458.1[1] | – | – |
| Co(OH)2 (ai) | -518.0[1] | -369.0[1] | -134[1] | – |
| Co(OH)2 (ao) | – | -421.7[1] | – | – |
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution
References
List of references
- 1Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)
- ^ ΔfH°, -312.5 kJ · mol−1
- ^ ΔfG°, -269.8 kJ · mol−1
- ^ S°, 109.16 J · K−1 · mol−1
- ^ Cp°, 78.49 J · K−1 · mol−1
- ^ ΔfH°, -392.5 kJ · mol−1
- ^ ΔfG°, -316.7 kJ · mol−1
- ^ S°, 0 J · K−1 · mol−1
- ^ ΔfH°, -615. kJ · mol−1
- ^ ΔfH°, -923.0 kJ · mol−1
- ^ ΔfG°, -764.7 kJ · mol−1
- ^ S°, 188. J · K−1 · mol−1
- ^ ΔfH°, -2115.4 kJ · mol−1
- ^ ΔfG°, -1725.2 kJ · mol−1
- ^ S°, 343. J · K−1 · mol−1
- ^ ΔfH°, -986.09 kJ · mol−1
- ^ ΔfG°, -898.49 kJ · mol−1
- ^ S°, 83.39 J · K−1 · mol−1
- ^ Cp°, 87.49 J · K−1 · mol−1
- ^ ΔfH°, -544. kJ · mol−1
- ^ ΔfH°, -1002.82 kJ · mol−1
- ^ ΔfG°, -868.07 kJ · mol−1
- ^ S°, -74.5 J · K−1 · mol−1
- ^ ΔfH°, -1218.4 kJ · mol−1
- ^ ΔfH°, -795.8 kJ · mol−1
- ^ ΔfG°, -748.1 kJ · mol−1
- ^ S°, 104.6 J · K−1 · mol−1
- ^ Cp°, 72.59 J · K−1 · mol−1
- ^ ΔfH°, -471.5 kJ · mol−1
- ^ ΔfG°, -479.24 kJ · mol−1
- ^ S°, 290.27 J · K−1 · mol−1
- ^ Cp°, 59.33 J · K−1 · mol−1
- ^ ΔfH°, -877.13 kJ · mol−1
- ^ ΔfG°, -816.01 kJ · mol−1
- ^ S°, 59.8 J · K−1 · mol−1
- ^ ΔfH°, -1109.2 kJ · mol−1
- ^ ΔfH°, -1402.9 kJ · mol−1
- ^ ΔfH°, -2009.6 kJ · mol−1
- ^ ΔfH°, -2607.9 kJ · mol−1
- ^ ΔfG°, -450.1 kJ · mol−1
- ^ ΔfH°, -539.7 kJ · mol−1
- ^ ΔfG°, -454.3 kJ · mol−1
- ^ S°, 79. J · K−1 · mol−1
- ^ ΔfG°, -458.1 kJ · mol−1
- ^ ΔfH°, -518.0 kJ · mol−1
- ^ ΔfG°, -369.0 kJ · mol−1
- ^ S°, -134. J · K−1 · mol−1
- ^ ΔfG°, -421.7 kJ · mol−1