Monobasic, defined

Define monoprotic acid, polyprotic acid, monobasic base, polybasic base, titration curve, and inflection point. 

In Chapter 3 we described how an uncharged metal complex MA is formed from a metal ion central atom) through a stepwise reaction with the anion A (ligand) of a monobasic organic acid, HA, defining a stepwise formation constant k , and an overall formation constant (3 , where... 

For a monobasic weak acid, HA, the thermodymanic dissociation constant (fiT ) is defined as follows ... 

One method has been proposed for testing the n = 0 model for monobasic acids (Kreevoy, 1965b). That involves the relation between kkaIkda (defined in Section IIA3) and ha/ da- If the n = 0 mechanism is correct, and if there are no isotope effects other than the primary isotope effect, kha/ da is given by equation (54). To test this equation... 

Alkyd resins have been the workhorse for the coatings industry over the last half century. The term alkyd was coined to define the reaction product of polyhydric alcohols and polybasic acids, in other words, polyesters. However, its definition has been narrowed to include only those polyesters containing monobasic acids, usually long-chain fatty acids. Thus thermoplastic polyesters typified by polyethylene terephthalate (PET) used in synthetic fibers, films, and plastics and unsaturated polyesters typified by the condensation product of glycols and unsaturated dibasic acids (which are widely used in conjunction with vinylic monomers in making sheet molding compounds or other thermosetting molded plastics) are not considered as part of the alkyd family and are beyond the scope of the present discussion. 

The degree of dissociation, on the other hand, depends, in a well-defined manner, on the pK of the analyte and the pH of the solution, according to the Hen-derson-Hasselbalch equation, a, is a function of and pH for example, for monobasic neutral acids... 

The buffer capacity is defined as the number of moles per litre of strong monobasic acid or base required to produce an increase or decrease of one pH unit in the solution. When the concentrations of salt and acid are equal, the log term in the Henderson-Hasselbalch equation becomes the logarithm of 1, which equals 0. To move the pH of the buffer solution by one unit of pH will require the Henderson-Hasselbalch equation to become... 

Some phosphonic acids in alcohols or acetone behave as though they are monobasic when titrated potentiometrically. However, they give two well-defined deflections of the titrimetric curve when DMF is the solvent. The pjSTa values of the first ionization of alkylphosphonic acids (232) increased with... 

Alkyd resins have been defined as the reaction product of a polybasic acid and a polyhydric alcohol. This definition Includes polyester resins of which alkyds are a particular type. The specific definition that has gained wide acceptance is that alkyds are polyesters modified with monobasic fatty acids. In recent years, the term nonoil or oil-free alkyd has come into use to describe polyesters formed by the reaction of polybasic acids with polyhydric alcohols in non-stoichlometric amounts. These products are best described as functional saturated polyesters containing unreacted OH and/or COOH groups, and they are finding rapidly increasing uses in organic coatings. 

It is known that there is a simple relationship between the pH value and the degree of dissociation a or the degree of neutralization P for low-molar-mass monobasic electrolytes. The equilibrium dissociation constant K of an acid HA is defined as = [H ][A ]/[HA]. In logarithmic form, this gives... 

The esterification equivalent of solid resins is defined as the weight in grams esterified by one mole of monobasic acid. This value includes both the epoxy and hydroxyl groups of the solid resin. It is determined by esterification of the sample with acetic anhydride in the presence of pyridinium chloride, followed by titration with sodium methoxide to a thymol blue-phenolphthalein end point. 

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