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Effects of substituents on the acidity of phenols: Existence of electron attracting group, (for example-NO2, -X, - NR, -CN, -CHO, -COOH) on the benzene ring increases the acidity of phenol since it enables the ring to draw much more electrons from the phenoxy oxygen and so releasing easily the proton.
Organic acids, though weak, are known to affect the rate of CO 2 corrosion to avery large extent (Menaul, 1944; Schock and Sudbury, 1951; Obukhova, 1973;Hedges and McVeigh, 1999; Garsany et al., 2002, 2005; Joosten et al., 2002; Guoet al., 2005; Nafday and Nesic, 2005; Singer et al., 2004; Okafor, 2004; Whalley,1987).rganic acids, though weak, are known to affect the rate of CO 2 corrosion to avery large extent (Menaul, 1944; Schock and Sudbury, 1951; Obukhova, 1973;Hedges and McVeigh, 1999; Garsany et al., 2002, 2005; Joosten et al., 2002; Guoet al., 2005; Nafday and Nesic, 2005; Singer et al., 2004; Okafor, 2004; Whalley,1987).