Abstract
Density data for dilute aqueous solutions of RbNO3 and TlNO3 at 25°C lead to the following equations for the apparent molal volumes: RbNO3: ΦV = 43.07 + 2.46 c1/2 + 0.15 c (0-0.41 M) TINO3: ΦV = 39.50 + 10.83 c1/2 - 25.46 c + 26.0 c3/2 (0.03-0.25 M) From these expressions and a semiempirical equation for Φv of a completely dissociated 1:1 electrolyte, values of ΔΦv for ion pair formation at c=0.10 are calculated to be+5 ml-mole-1 for RbNO3 and+12 ml-mole-1 for TlNO3. Comparison of ΔΦv with the electrostriction volume effect suggests that virtually all of the electrostriction is removed in the formation of the TlNO3 ion pair but only about half with RbNO3. Values of ΔΦv are in poor agreement with those estimated from electrostatic theories of ion pair formation.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 91-102 |
| Number of pages | 12 |
| Journal | Journal of Solution Chemistry |
| Volume | 3 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 1974 |
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Keywords
- apparent molal volume
- density
- electrolyte solution
- electrostriction
- Ion pair
- magnetic float
- rubidium nitrate
- thallium(I) nitrate
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
Cite this
Volume change of ion pair formation : Rubidium nitrate and thallium(I) nitrate in water. / Masterton, William L.; Welles, Harry; Knox, Jonathan H.; Millero, Frank J.
In: Journal of Solution Chemistry, Vol. 3, No. 2, 02.1974, p. 91-102.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Volume change of ion pair formation
T2 - Rubidium nitrate and thallium(I) nitrate in water
AU - Masterton, William L.
AU - Welles, Harry
AU - Knox, Jonathan H.
AU - Millero, Frank J
PY - 1974/2
Y1 - 1974/2
N2 - Density data for dilute aqueous solutions of RbNO3 and TlNO3 at 25°C lead to the following equations for the apparent molal volumes: RbNO3: ΦV = 43.07 + 2.46 c1/2 + 0.15 c (0-0.41 M) TINO3: ΦV = 39.50 + 10.83 c1/2 - 25.46 c + 26.0 c3/2 (0.03-0.25 M) From these expressions and a semiempirical equation for Φv of a completely dissociated 1:1 electrolyte, values of ΔΦv for ion pair formation at c=0.10 are calculated to be+5 ml-mole-1 for RbNO3 and+12 ml-mole-1 for TlNO3. Comparison of ΔΦv with the electrostriction volume effect suggests that virtually all of the electrostriction is removed in the formation of the TlNO3 ion pair but only about half with RbNO3. Values of ΔΦv are in poor agreement with those estimated from electrostatic theories of ion pair formation.
AB - Density data for dilute aqueous solutions of RbNO3 and TlNO3 at 25°C lead to the following equations for the apparent molal volumes: RbNO3: ΦV = 43.07 + 2.46 c1/2 + 0.15 c (0-0.41 M) TINO3: ΦV = 39.50 + 10.83 c1/2 - 25.46 c + 26.0 c3/2 (0.03-0.25 M) From these expressions and a semiempirical equation for Φv of a completely dissociated 1:1 electrolyte, values of ΔΦv for ion pair formation at c=0.10 are calculated to be+5 ml-mole-1 for RbNO3 and+12 ml-mole-1 for TlNO3. Comparison of ΔΦv with the electrostriction volume effect suggests that virtually all of the electrostriction is removed in the formation of the TlNO3 ion pair but only about half with RbNO3. Values of ΔΦv are in poor agreement with those estimated from electrostatic theories of ion pair formation.
KW - apparent molal volume
KW - density
KW - electrolyte solution
KW - electrostriction
KW - Ion pair
KW - magnetic float
KW - rubidium nitrate
KW - thallium(I) nitrate
UR - http://www.scopus.com/inward/record.url?scp=0009101438&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0009101438&partnerID=8YFLogxK
U2 - 10.1007/BF00646879
DO - 10.1007/BF00646879
M3 - Article
AN - SCOPUS:0009101438
VL - 3
SP - 91
EP - 102
JO - Journal of Solution Chemistry
JF - Journal of Solution Chemistry
SN - 0095-9782
IS - 2
ER -