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Zn2+ + 4SCN → [Zn(SCN)4]2−

Reaction of zinc ion and thiocyanate ion
Zn2+Zinc ion + 4SCNThiocyanate ion
[Zn(SCN)4]2−Tetrakis(thiocyanato)zincate ion

The reaction of zinc ion and thiocyanate ion yields tetrakis(thiocyanato)zincate ion (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:

Table of contents
  1. 1Reaction data
  2. 2Thermodynamic changes
  3. 3References
  4. 4Related reactions
  5. 5Related categories

Reaction data

Chemical equation

Reaction of zinc ion and thiocyanate ion
Zn2+Zinc ion + 4SCNThiocyanate ion
[Zn(SCN)4]2−Tetrakis(thiocyanato)zincate ion

General equation

Reaction of cation and anion
CationLewis acid + AnionLewis base
ProductLewis conjugate + (H2O)

Oxidation state of each atom

Reaction of zinc ion and thiocyanate ion

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
Zn2+Zinc ion1
Lewis acid
Cation
SCNThiocyanate ion4
Lewis base
Anion

Products

Chemical formulaNameCoefficientTypeType in general
equation
[Zn(SCN)4]2−Tetrakis(thiocyanato)zincate ion1
Lewis conjugate

Thermodynamic changes

Thermodynamic data of reactants

Chemical formulaStandard 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
Zn2+ (g)2782.78[1]
Zn2+ (ao)-153.89[1]-147.06[1]-112.1[1]46[1]
SCN (ao)76.44[1]92.71[1]144.3[1]-40.2[1]
* (g):Gas, (ao):Un-ionized aqueous solution

Thermodynamic data of products

Chemical formulaStandard 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
[Zn(SCN)4]2−

References

List of references

  1. 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
    National Institute of Standards and Technology (NIST)