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Sagot :
Answer:
0.0875M of Acetic Acid
Explanation:
Based on the reaction of acetic acid (HX) with sodium hydroxide (NaOH):
HX + NaOH → NaX + H₂O
1 mole of acetic acid reacts with 1 mole of NaOH
That means the moles of sodium hydroxide added = Moles the acetic acid at the equivalence point.
To solve this question we have to find the moles of NaOH = Moles HX. With the moles and the volume (25.0mL = 0.0250L) we can find the molarity of the acetic acid:
Moles NaOH = Moles Acetic acid:
12.5mL = 0.0125L * (0.175mol / L) = 0.00219 moles Acetic Acid
Molarity acetic acid:
0.00219 moles Acetic Acid / 0.0250L =
0.0875M of Acetic Acid
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