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Consider the titratkon of 50.0 mL of 0.200 M HC2H3O2 (Ka = 1.8 x 10-5) with 0.100...

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Chemistry

Consider the titratkon of 50.0 mL of 0.200 MHC2H3O2 (Ka = 1.8 x10-5) with 0.100 M NaOH.

(A.) Calculate the pH of theHC2H3O2 before the addition ofNaOH

(B.) Calculate the pH of the solution after the addition of 20.0mL of 0.100 M NaOH.

(C.) Calculate the pH of the solution after the addition of 50.0mL of 0.100 M NaOH.

(D.) Calculate the pH of the solution after the addition of100.0 mL of 0.100 M NaOH.

(E.) Calculate the pH of the solution after the addition of150.0 mL of 0.100 M NaOH.

Answer & Explanation Solved by verified expert
4.4 Ratings (621 Votes)
AHC2H3O2 is acetic acid usually written CH3COOH it dissociatesas followsCH3COOH CH3COO H Ka 18 x 105If x moles of CH3COOH dissociate x moles of H and xmoles of CH3COO are produced and the concentration ofCH3COOH is reduced by xKa CH3COO H CH3COOHKa x2 020 xx will be small compared to 020 soKa x2 020 18 x105 x2 020x2 36 x 106 x 19 x103H x 19 x 103pH log H log 19 x 103 272BMolarity Moles Liter500 mL of 0200 M CH3COOHMoles of CH3COOH 005 L x 02 M 001 mole200 mL of 0100 M NaOHMoles of NaOH 002 L x 01 M 0002 mole0002 mole of    See Answer
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