CuSCN + 2Sr(OH)2 → SrS + SrCO3 + CuOH + NH3↑
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The reaction of copper(I) thiocyanate and strontium hydroxide yields strontium sulfide, strontium carbonate, copper(I) hydroxide, and ammonia. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of copper(I) thiocyanate and strontium 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 copper(I) thiocyanate and strontium hydroxide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CuSCN | Copper(I) thiocyanate | 1 | Brønsted acid | Salt of weak base |
| Sr(OH)2 | Strontium hydroxide | 2 | Brønsted base | Strong base |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| SrS | Strontium sulfide | 1 | Conjugate acid | Salt of strong base |
| SrCO3 | Strontium carbonate | 1 | Conjugate acid | Salt of strong base |
| CuOH | Copper(I) hydroxide | 1 | Conjugate base | Weak base |
| NH3 | Ammonia | 1 | Conjugate base | Weak base |
Thermodynamic changes
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 |
|---|---|---|---|---|
| CuSCN (cr) | – | 69.9[1] | – | – |
| CuSCN (ai) | 148.11[1] | 142.69[1] | 184.9[1] | – |
| Sr(OH)2 (cr) | -959.0[1] | – | – | – |
| Sr(OH)2 (g) | -565[1] | – | – | – |
| Sr(OH)2 (cr) 1 hydrate | -1264.8[1] | – | – | – |
| Sr(OH)2 (cr) 8 hydrate | -3352.2[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 |
|---|---|---|---|---|
| SrS (cr) | -472.4[1] | -467.8[1] | 68.2[1] | 48.70[1] |
| SrS (g) | 109[1] | – | – | – |
| SrCO3 (cr) | -1220.1[1] | -1140.1[1] | 97.1[1] | 81.42[1] |
| SrCO3 (ai) | -1222.94[1] | -1087.29[1] | -89.5[1] | – |
| CuOH | – | – | – | – |
| NH3 (g) | -46.11[1] | -16.45[1] | 192.45[1] | 35.06[1] |
| NH3 (ao) | -80.29[1] | -26.50[1] | 111.3[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)
- ^ ΔfG°, 69.9 kJ · mol−1
- ^ ΔfH°, 148.11 kJ · mol−1
- ^ ΔfG°, 142.69 kJ · mol−1
- ^ S°, 184.9 J · K−1 · mol−1
- ^ ΔfH°, -959.0 kJ · mol−1
- ^ ΔfH°, -565. kJ · mol−1
- ^ ΔfH°, -1264.8 kJ · mol−1
- ^ ΔfH°, -3352.2 kJ · mol−1
- ^ ΔfH°, -472.4 kJ · mol−1
- ^ ΔfG°, -467.8 kJ · mol−1
- ^ S°, 68.2 J · K−1 · mol−1
- ^ Cp°, 48.70 J · K−1 · mol−1
- ^ ΔfH°, 109. kJ · mol−1
- ^ ΔfH°, -1220.1 kJ · mol−1
- ^ ΔfG°, -1140.1 kJ · mol−1
- ^ S°, 97.1 J · K−1 · mol−1
- ^ Cp°, 81.42 J · K−1 · mol−1
- ^ ΔfH°, -1222.94 kJ · mol−1
- ^ ΔfG°, -1087.29 kJ · mol−1
- ^ S°, -89.5 J · K−1 · mol−1
- ^ ΔfH°, -46.11 kJ · mol−1
- ^ ΔfG°, -16.45 kJ · mol−1
- ^ S°, 192.45 J · K−1 · mol−1
- ^ Cp°, 35.06 J · K−1 · mol−1
- ^ ΔfH°, -80.29 kJ · mol−1
- ^ ΔfG°, -26.50 kJ · mol−1
- ^ S°, 111.3 J · K−1 · mol−1