Final answer:
The dissociation constant, or acid dissociation constant (Ka), is a measure of how well a weak acid dissociates into its ions in water. To calculate the percent dissociation, we determine the concentration of dissociated ions and compare it to the initial concentration of the acid. In this case, the percent dissociation is 100%. The impact of temperature on dissociation can vary depending on the acid.
This correct answer is none of the above.
Step-by-step explanation:
The dissociation constant, also known as the acid dissociation constant (Ka), is a measure of how well a weak acid dissociates into its ions in water. It represents the equilibrium constant for the ionization reaction of the acid. The value of Ka indicates the extent to which the acid dissociates.
To calculate the percent dissociation of a 1.0 x 10^(-3) M solution of salicylic acid, we need to determine the concentration of dissociated ions. The dissociation reaction of salicylic acid in water can be represented as:
C6H4(OH)COOH(aq) → C6H4(OH)COO-(aq) + H+(aq)
Since the dissociation constant for salicylic acid is 1.0 x 10^(-3), we can assume that the concentration of C6H4(OH)COO-(aq) is equal to the concentration of H+(aq) at equilibrium. Therefore, the concentration of dissociated ions is 1.0 x 10^(-3) M.
To determine the percentage of molecules dissociated, we need to compare the concentration of dissociated ions to the initial concentration of salicylic acid. In this case, the initial concentration is also 1.0 x 10^(-3) M. Therefore, the percentage of molecules dissociated is:
(1.0 x 10^(-3) M / 1.0 x 10^(-3) M) x 100% = 100%
The impact of temperature on dissociation can vary depending on the specific acid. In general, increasing the temperature can increase the rate of dissociation and therefore increase the percentage of molecules dissociated.
However, some acids may exhibit the opposite behavior, with dissociation decreasing at higher temperatures. It is important to consider the specific acid and its properties when analyzing the impact of temperature.
This correct answer is none of the above.