Equilibrium Concentration of Weak Acid, HA Upon Titration
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If 64.0 mL of 0.133 mol/L NaOH(aq) and 35.0 mL of 0.185 mol/L HA(aq) are mixed, then what is [HA] at equilibrium? Assume that HA is a weak monoprotic acid with pKa=5.23 at 25oC.
Give your answer with three significant figures.
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Solution Summary
A detailed solution showing how the concentration of weak acid, HA at equilibrium is computed after addition of a certain amount of strong base, NaOH. The corresponding amounts of acid and base is accounted for during neutralization reaction in order to determine the amount remaining at equilibrium.
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Answer:
HA will react with OH- from NaOH in the following reaction:
HA + OH- → A- + H2O
Initial mmol 6.475 8.512 ----
Change -6.475 -6.475 +6.475
mmol at Equilibrium ------- 2.037 6.475
concentration 0.0206 0.065
Notes:
1. Initial ...
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