*CHEMISTRY ACID/BASE QUESTION*** In addition to the acid-dissociation constant,
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*CHEMISTRY ACID/BASE QUESTION***
In addition to the acid-dissociation constant, Ka, another measure of the strength of an acid is percent dissociation, determined by the following formula: Percent dissociation HA] dissociated Percent dissociation increases with increasing Ka. Strong acids, for which Ka is very large, dissociate completely (100%). For weak acids, the percent dissociation changes with concentration. The more diluted the acid is, the greater percent dissociation [HA] dissociated 100% [HA] initial-x100%Explanation / Answer
Part A
HNO3 is a strong acid it will dissociate completely so
concentration of HNO3 will be the concentration of [H+]
pH = -log[H+]
pH = -log[4.51 x 10-3]
pH = 2.35
part B
here first we need to find out the Concentration of HClO4
Molarity = No of moles / liter in
no of moles = 0.43 / 100
= 0.0043 moles
now molarity = 0.0043/2.5
= 0.00172 M
= 1.72 x 10-3 M
ahain here HClO4 is very strong aacid
concentration of HClO4 = concentraion of H+
pH = -log[1.72 x 10-3]
pH = 2.77
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