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Sagot :
The pH at 25.0 °c of an aqueous solution that is 0. 100 m in acetic acid is 5.744.
What is ka expression?
The acid dissociation constant is the equilibrium constant of an acid's dissociation reaction.
The ka is given [tex]1. 8 \times 10^-^5[/tex]
From the equation pf ka for weak acid
[tex]\rm H^+ = \sqrt{Ka \times C}[/tex]
Putting the values in the equation
[tex]\rm H^+ = \sqrt{ 1. 8 \times 10^-^5 \times 0.100 } = 0.0000018[/tex]
Now, the [tex]\rm pH = -log[H^+][/tex]
[tex]\rm pH = -log[0.0000018] = 5.744[/tex]
Thus, the pH of acetic acid is 5.744
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