The CO2-water system. I. Study of the slower hydration-dehydration step |
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| Authors: | Ramesh C Patel Ralph J Boe Gordon Atkinson |
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| Institution: | (1) Department of Chemistry, University of Maryland, 20740 College Park, Maryland;(2) Present address: Department of Chemistry, The University of Oklahoma, 73069 Norman, Oklahoma;(3) Present address: E. I. du Pont de Nemours and Co., 37401 Chattanooga, Tennessee |
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| 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. |
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| Keywords: | Relaxation kinetics pressure jump concentration jump stopped flow carbonic acid isotope effects |
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