Calcium, doubly charged positive ion

• Formula: Ca⁺²
• Molecular weight: 40.077
• CAS Registry Number: 14127-61-8
• Information on this page:
  • Reaction thermochemistry data
  • Ion clustering data
  • References
  • Notes
• Options:
  • Switch to calorie-based units

Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

(Ca⁺² • 10) +  = (Ca⁺² • 11)

By formula: (Ca⁺² • 10H₂O) + H₂O = (Ca⁺² • 11H₂O)

Free energy of reaction

(Ca⁺² • 11) +  = (Ca⁺² • 12)

By formula: (Ca⁺² • 11H₂O) + H₂O = (Ca⁺² • 12H₂O)

Free energy of reaction

(Ca⁺² • 9) +  = (Ca⁺² • 10)

By formula: (Ca⁺² • 9H₂O) + H₂O = (Ca⁺² • 10H₂O)

Free energy of reaction

(Ca⁺² • 8) +  = (Ca⁺² • 9)

By formula: (Ca⁺² • 8H₂O) + H₂O = (Ca⁺² • 9H₂O)

Free energy of reaction

(Ca⁺² • 4 • ) +  = (Ca⁺² • 5 • )

By formula: (Ca⁺² • 4CO₂ • CCaO₃) + CO₂ = (Ca⁺² • 5CO₂ • CCaO₃)

Free energy of reaction

(Ca⁺² • 5) +  = (Ca⁺² • 6)

By formula: (Ca⁺² • 5CO₂) + CO₂ = (Ca⁺² • 6CO₂)

Free energy of reaction

Ion clustering data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

(Ca⁺² • 4 • ) +  = (Ca⁺² • 5 • )

By formula: (Ca⁺² • 4CO₂ • CCaO₃) + CO₂ = (Ca⁺² • 5CO₂ • CCaO₃)

Free energy of reaction

(Ca⁺² • 5) +  = (Ca⁺² • 6)

By formula: (Ca⁺² • 5CO₂) + CO₂ = (Ca⁺² • 6CO₂)

Free energy of reaction

(Ca⁺² • 8) +  = (Ca⁺² • 9)

By formula: (Ca⁺² • 8H₂O) + H₂O = (Ca⁺² • 9H₂O)

Free energy of reaction

(Ca⁺² • 9) +  = (Ca⁺² • 10)

By formula: (Ca⁺² • 9H₂O) + H₂O = (Ca⁺² • 10H₂O)

Free energy of reaction

(Ca⁺² • 10) +  = (Ca⁺² • 11)

By formula: (Ca⁺² • 10H₂O) + H₂O = (Ca⁺² • 11H₂O)

Free energy of reaction

(Ca⁺² • 11) +  = (Ca⁺² • 12)

By formula: (Ca⁺² • 11H₂O) + H₂O = (Ca⁺² • 12H₂O)

Free energy of reaction

References

Go To: Top, Reaction thermochemistry data, Ion clustering data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Blades, Jayaweera, et al., 1990
Blades, A.T.; Jayaweera, P.; Ikonomou, M.G.; Kebarle, P., Studies of Alkaline - Earth and Transition - Metal M++ Gas - Phase Ion Chemistry, J. Chem. Phys., 1990, 92, 10, 5900, https://doi.org/10.1063/1.458360 . [all data]

Spears and Fehsenfeld, 1972
Spears, K.G.; Fehsenfeld, F.C., Termolecular Association Reactions of Mg, Ca, and Ba Ions, J. Chem. Phys., 1972, 56, 11, 5698, https://doi.org/10.1063/1.1677091 . [all data]

Notes

Go To: Top, Reaction thermochemistry data, Ion clustering data, References

• Symbols used in this document:
  

  T	Temperature
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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