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  • Relaxation kinetics  (1)
  • phenol red  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Thermodynamic parameters of coupled chemical reactions from temperature jump relaxation amplitudes (1981)
    Springer
    Journal of solution chemistry 10 (1981), S. 39-50 
    Details
    ISSN: 1572-8927
    Keywords: Temperature jump ; kinetics ; thermodynamics ; TRIS ; iminodiacetic acid ; magnesium ion ; phenol red
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Equations describing the temperature jump amplitudes associated with a system of two coupled reactions (TRIS-phenol red) as well as the ternary system (Mg2+-iminodiacetic acid-phenol red) are presented. The termodynamic parameters calculated from experimentally measured temperature perturbation amplitudes using a multiparametric curve fitting procedure are found to be in good agreement with those determined from pH- and costant rate thermometric titrations. For phenol red, pK I =7.55, ΔH I =3.45 kcal, and for Mg2+ iminodiacetic acid, log K M =2.84, ΔH M =3.25 kcal, were obtained. It is shown that this method can be used to determine accurate thermodynamic enthalpy changes over a narrow temperature interval of less than 1.0°C from a single experiment requiring about 50 μl of sample solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00652779
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The CO2-water system. I. Study of the slower hydration-dehydration step (1973)
    Springer
    Journal of solution chemistry 2 (1973), S. 357-372 
    Details
    ISSN: 1572-8927
    Keywords: Relaxation kinetics ; pressure jump ; concentration jump ; stopped flow ; carbonic acid ; isotope effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Using pressure-jump, concentration-jump, and stopped-flow methods, we have studied the rate of dehydration (k−1) of carbonic acid as a function of temperature (0–40°C) and ionic strength (0.005–3M NaCl, 3M LiBr) in both H2O and D2O. A new design of pressure-jump cell with reliable temperature control, as well as improved sensitivity in the spectrophotometric detection for stopped flow, enabled k−1 values to be determined with an accuracy better than ±8%, based on a comparison of results obtained using five different techniques. The influence of ionic strength, temperature, and isotope effects are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00713250
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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