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Citation: Zou Li-Chun, Wang Xiao-Ling, Zhang Pi-Jian, Wang Feng-Ge, Zhou Bao-Xue, Jiang Hui-Min, Qu Song-Sheng. Standard Gibbs Energies of Transfer of Ammonium Tetraphenylborate from Water to Water-t-butyl Alcohol Mixed Solvents and the Primary Medium Effect[J]. Acta Physico-Chimica Sinica, ;2000, 16(12): 1119-1124. doi: 10.3866/PKU.WHXB20001211 shu

Standard Gibbs Energies of Transfer of Ammonium Tetraphenylborate from Water to Water-t-butyl Alcohol Mixed Solvents and the Primary Medium Effect

1.
Department of Chemistry,Yantai Teachers College,Yantai 264025

Received Date: 21 April 2000
Available Online: 15 December 2000

Solubilities of ammonium tetraphenylborate (NH4BPh4) in water-t-butyl alcohol (TBA) mixed solvents at 283.15,293.15,298.15,303.15 and 308.15K have been determined by spectrophotometry.The standard Gibbs energy of transfer (ΔGΘt) of NH4BPh4 from water to H2)-TBA mixtures and the primary medium effect of NH4BPh4 from 283.15 to 308.15K were studied.The results show that-ΔGΘt exhibits a complicated variation pattern with the increase in the mole fraction of TBA [x(TBA)] at the same temperature.When x(TBA)<0.06,-ΔGΘt increases very slowly with x(TBA),the-ΔGΘt increases rapidly with x(TBA) when x(TBA) from 0.06 to 0.2.For x(TBA)>0.2,the -ΔGΘtdecreases with increasing x(TBA).The largest value of -ΔGΘt occurs at x(TBA)=0.2.The main reason for this variation was analyzed and discussen.
- Ammonium tetraphenylborate,
- Solubility,
- Activity coeffcient,
- Gibbs energy of transfer,
- Primary medium effect
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