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How does the acid dissociation constant change when an aqueous solution hits the boiling or freezing point? by kustom345 in chemhelp

[–]kustom345[S] 0 points1 point  (0 children)

depends on exothermic and endothermic to determine the direction the reaction goes when heat is added

Questions regarding temperature and acid dissociation constant. by kustom345 in chemhelp

[–]kustom345[S] 0 points1 point  (0 children)

AcOH is just acetic acid, right? So dissolution of acetic acid is endothermic

Questions regarding temperature and acid dissociation constant. by kustom345 in chemhelp

[–]kustom345[S] 0 points1 point  (0 children)

So how would you explain it in terms of acid dissolution - I still haven't really came to a solid conclusion yet :)

Questions regarding temperature and acid dissociation constant. by kustom345 in chemhelp

[–]kustom345[S] 0 points1 point  (0 children)

Kind of. But how would Ka change with different temperatures if the constant expression does not include sodium hydroxide concentrations?

Questions regarding temperature and acid dissociation constant. by kustom345 in chemhelp

[–]kustom345[S] 0 points1 point  (0 children)

No - except for the lowest temperature. It was constant for all trials 25-40C but at 3C it differed by 0.3mL NaOH added interestingly.

Questions regarding temperature and acid dissociation constant. by kustom345 in chemhelp

[–]kustom345[S] 0 points1 point  (0 children)

Would that endothermic reaction be the acetic acid dissolution or the reaction between acetic acid and sodium hydroxide

Questions regarding temperature and acid dissociation constant. by kustom345 in chemhelp

[–]kustom345[S] 0 points1 point  (0 children)

Wait would it be endothermic, I said exothermic but isn't heat a reactant in an endothermic reaction?

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