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For example, acetic acid is a weak acid which has a = 1.75 x 10 −5. Its conjugate base is the acetate ion with K b = 10 −14 /K a = 5.7 x 10 −10 (from the relationship K a × K b = 10 −14), which certainly does not correspond to a strong base. The conjugate of a weak acid is often a weak base and vice versa.
A weak acid may be defined as an acid with pK a greater than about −2. An acid with pK a = −2 would be 99 % dissociated at pH 0, that is, in a 1 M HCl solution. Any acid with a pK a less than about −2 is said to be a strong acid. Strong acids are said to be fully dissociated.
Hydrazinium is a weak acid with pK a = 8.1. Salts of hydrazinium are common reagents in chemistry and are often used in certain industrial processes. [ 1 ] Notable examples are hydrazinium hydrogensulfate , N 2 H 6 SO 4 or [N 2 H 5 ] + [HSO 4 ] − , and hydrazinium azide , N 5 H 5 or [N 2 H 5 ] + [N 3 ] − .
The charge of a molecule depends upon the pH of its solution. In an acidic medium, basic drugs are more charged and acidic drugs are less charged. The converse is true in a basic medium. For example, Naproxen is a non-steroidal anti-inflammatory drug that is a weak acid (its pKa value is 5.0). The gastric juice has a pH of 2.0. It is a three ...
In water, measurable pK a values range from about −2 for a strong acid to about 12 for a very weak acid (or strong base). A buffer solution of a desired pH can be prepared as a mixture of a weak acid and its conjugate base. In practice, the mixture can be created by dissolving the acid in water, and adding the requisite amount of strong acid ...
Dassai – meaning “otter festival” in Japanese – is one of the most popular sake brands on the market. But its maker is also behind premium products popular with collectors willing to spend ...
The vast majority of people whose call records have been stolen by Chinese hackers have not been notified, according to industry sources, and there is no indication that most affected people will ...
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