Enough of a monoprotic acid is dissolved in water to produce a 0.0158 m solution. the ph of the resulting solution is 2.64. calculate the a for the acid.
pH = 2.64
pH = - log [H+]
[H+] = 0.00229 M
HA = 0.0199 M
Dissociation equation
HA --> H+ + A-
Ka = [H+][A-]/[HA]
[H+] = [A-]
Ka = (0.00229^2)/0.0158
=3.31 x 10^-4M
What is monoprotic acids?
Any acid with only one hydrogen atom in its formula is called a monoprotic acid, while some acids with multiple hydrogen atoms may also fall under this category. In other words, while all monoprotic acids contain only one hydrogen, not all single-hydrogen acids are monoprotic.
Therefore,
Enough of a monoprotic acid is dissolved in water to produce a 0.0158 m solution. the ph of the resulting solution is 2.64. calculate the a for the acid.
pH = 2.64
pH = - log [H+]
[H+] = 0.00229 M
HA = 0.0199 M
Dissociation equation
HA --> H+ + A-
Ka = [H+][A-]/[HA]
[H+] = [A-]
Ka = (0.00229^2)/0.0158
=3.31 x 10^-4M
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