Hydration determination

Calculate the percentage of water in the hydrate. Determine the experimental error. Show all your work. 

The point of full hydration determined by the heat capacity response corresponds to 0.38 h, or 300 mol of water per mol of lysozyme. The... 

The Idnetic rate constants for CO2 hydration determined in the laboratory in sterile seawater (Table 4.6) are known sufficiently well that this value should create little uncertainty in the above calculation. However, in natural waters the reaction rates may be enzymatically catalyzed. Carbon dioxide hydration catalysis by carbonic anhydrase (CA) is the most powerful enzyme reaction known (see the discussion in Section 9.3). The catal5dic turnover number (the number of moles of substrate reacted, divided by the number of moles of enz5mie present) is 8 x 10 min for CA (Table 9.7), and marine diatoms are loiown to produce carbonic anhydrase (Morel et al, 1994). The calculations presented in Fig. 10.14 indicate that increasing the CO2 hydration rate constant by 10-fold should increase the gas exchange rate of CO2 in the ocean by 10%-50%. 

Exposed to water, the strong polymeric acids dissociate into anionic groups fixed at the side chains and free mobile protons in the aqueous solution. Thereby, the degree of hydration determines the availability and mobility of protons in the water-containing domains. 

The corrected magnetic susceptibihty of chromium(II) acetate hydrate determined by the Gouy method (using an aqueous slurry covered with a layer of petroleum ether to exclude air) is reported to be /moi = 94x 10 cm moF. ... 

Characterisation of cement hydration is essential for both researchers and practitioners. Measurement of chemical shrinkage provides information on the overall development of hydration, assuming that the products are independent of the degree of hydration. Determination of the degree of hydration requires knowledge of the ultimate value of chemical shrinkage, which depends on both binder composition and temperature. Measurement of chemical shrinkage is undertaken on a saturated sample. 

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