Conjugate acid-base pair strength

Figure 15.1 Conjugate acid-base pair strengths.

To express the relative strengths of an acid and its conjugate base (a conjugate acid-base pair ), we consider the special case of the ammonia proton transfer equilibrium, reaction C, for which the basicity constant was given earlier (Kb = [NH4+l[OH ]/ NH3]). Now let s consider the proton transfer equilibrium of ammonia s conjugate acid, NH4+, in water ... [Pg.529]

TABLE P a 10.3 Conjugate Acid-Base Pairs Arranged by Strength Acid name Acid formula Base formula Base name PKb... [Pg.530]

TABLE 10.3 Conjugate Acid-Base Pairs Arranged by Strength... [Pg.608]

TABLE 15.1 Relative Strengths of Conjugate Acid -Base Pairs ... [Pg.616]

We ve seen in previous sections that the strength of an acid can be expressed by its Ka, and the strength of a base can be expressed by its Kb. For a conjugate acid-base pair, the two equilibrium constants are related in a simple way that makes it possible to calculate either one from the other. Let s consider the conjugate acid-base pair NH4+ and NH3, for example, where Ka refers to proton transfer from the acid... [Pg.637]

Definition of Acids and Bases 222 Conjugate Acid-Base Pairs 222 Amphoteric Species 224 Strong Acids 225 Strong Bases 225 Weak Acids 226 Weak Bases 226 Polyprotic Acids 227 Acid and Base Strength Ka and Kb 228 Acid/Base Strength of Conjugate Acid-Base Pairs 230 Acid-Base Reactions 231... [Pg.436]

The pKj and plCj, values provide a convenient means of comparing the strengths of weak acids and bases. The lower the pK, the stronger the acid the lower the pK, the stronger is the base. The pK values of a series of drugs are given in Talsle 3.6. plC and pX, values of conjugate acid-base pairs are linked... [Pg.77]

Table 10-2 displays relative acid and base strengths of a number of conjugate acid-base pairs. [Pg.382]

Table 15.2 lists some important conjugate acid-base pairs, in order of their relative strengths. Conjugate acid-base pairs have the following properties ... [Pg.604]

These arguments can easily be generalized. Thus if we have a conjugate acid-base pair A-B in which A has p dissociable protons bound equally firmly, while B has q equivalent points at which a proton can be attached, then the catalytic power of A is related to its acid strength by the equation... [Pg.199]

Figure 18.9 Strengths of conjugate acid-base pairs. The stronger the acid is, the weaker its conjugate base. The strongest acid appears at top left and the strongest base at bottom right. When an acid reacts with a base farther down the list, the reaction proceeds to the right (K,. > 1).

A FIGURE 16.3 Relative strengths of select conjugate acid-base pairs. The two... [Pg.657]

As the strength of an acid increases (Kg gets larger), the strength of its conjugate base must decrease (Ky gets smaller) so that the product X Ky remains 1.0 X 10 at 25 °C. TABLE 16.5 demonstrates this relationship. Remember, this important relationship applies only to conjugate acid—base pairs. [Pg.679]

SECTION 16.8 The relationship between the strength of an acid and the strength of its conjugate base is expressed quantitatively by the equation K X Ky = K , where K and Ky are dissociation constants for conjugate acid base pairs. [Pg.693]

In these reactions, there is a competition for protons between the two bases. Therefore, the relative amounts of the conjugate acid-base pairs that exist at equilibrium will be a measure of the strengths of the acids and bases. This is equivalent to saying that the dissociation constants measure strengths of acids and bases. [Pg.58]

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