Physics
Scientific paper
Dec 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975gecoa..39.1595w&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 39, Issue 12, pp.1595-1604
Physics
1
Scientific paper
The apparent molal volume, V of boric acid, B(OH) 3 and sodium borate, NaB(OH) 4 , have been determined in 35%. salinity seawater and 0·725 molal NaCl solutions at 0 and 25°C from precise density measurements. Similar to the behavior of nonelectrolytes and electrolytes in pure water, the V of B(OH) 3 is a linear function of added molality and the V of NaB(OH) 4 is a linear function of the square root of added molarity in seawater and NaCl solutions. The partial molal volumes, , of B(OH) 3 and NaB(OH) 4 in seawater and NaCl were determined from the V 's by extrapolating to infinite dilution in the medium. The of B(OH) 3 is larger in NaCl and seawater than pure water apparently due to the ability of electrolytes to dehydrate the nonelectrolyte B(OH) 3 . The of NaB(OH) 4 in itself, NaCl and seawater is larger than the expected value at 0·725 molal ionic strength due to ion pair formation [ Na + + B ( OH ) 4 - NaB ( OH ) 4 0 ]. The volume change for the formation of NaB(OH) 4 0 in itself and NaCl was found to be equal to 29·4 ml mol -1 at 25°C and 0·725 molal ionic strength. These large 's indicate that at least one water molecule is released when the ion pair is formed [ Na + + B ( OH ) 4 - H 2 O + NaOB ( OH ) 2 0 ]. The observed in seawater and the (NaB 0 ) in water and NaCl were used to estimate for the formation of MgB + and CaB + . The volume change for the ionization of B(OH) 3 in NaCl and seawater was determined from the molal volume data. Values of were found in seawater and in NaCl, respectively, at 0 and 25°C. The effect of pressure on the ionization of B(OH) 3 in NaCl and seawater at 0 and 25°C determined from the volume change is in excellent agreement with direct measurements in artificial seawater ( and , 1968; Disteche and Disteche, 1967) and natural seawater (Culberson and , 1968).
Millero Frank. J.
Ward Gary K.
No associations
LandOfFree
The effect of pressure on the ionization of boric acid in sodium chloride and seawater from molal volume data at 0 and 25°C does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The effect of pressure on the ionization of boric acid in sodium chloride and seawater from molal volume data at 0 and 25°C, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effect of pressure on the ionization of boric acid in sodium chloride and seawater from molal volume data at 0 and 25°C will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1577607