Question

EXP. 5 BUFFERS, TITRATION CURVES, AND INDICATORS LAB REPORT WORKSHEETS Solution D: 20.0 mL of 1:1 buffer + 5.00 ml NaOH. See the Buffers - Calculate the pH of a Buffer Solution after a Strong Base is added (MP4 file) Calculate the pH of the solution after mixing the buffer and base. An ICE table may be helpful. Use the pka of acetic acid (previously determined using the 1:1 buffer) in your calculation. Maior speues: Before CH 3 COOH, CH,COo, Na, on After CH ₂ COOH, CH₂000" wat

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Buffer volceme = 20.0mL Beeffer pka = 4.65 Before . [HAC] = 0.05085m Acctic Acid= Hic [ Aco] = 0.050809 Now Sear mmol of [HACI E concenbafron x vdame of buffer - 2 0.05085 mal x 20.0mL - mmol of Hac before 1.161 mmol NaOH addition, - mmol of [A & I before = 0.05086 Mol x 20.0mL Naon addihin = 1.0172 mmol Now Na oh is added 5ml, & concentration = 0.1435.0 - means momol of Naon is added a 0.5675 monol 7 Ch COOH + NaOH ř chcool na to means AcH (acetic acid monol is consumed - while & acetate monol is produced) Hence Niet read mind of Acetic Acid remain after Naoh add is = A 1.161 mmol - oso570-5675 mmol Weet immol of HAC is = 0.5935 mmel similarity mmol of Aco is a 1.0172 mmol +0.5675 mmol 1-5847 mmol Total udame of Butter is a 2015= 25 minas

NPH after smL of Naoh add to butter as PH : 4-65 t 1.5847 A 2smt 0.5675 mmof 25int TpH = 5.095 981 1927 after Naoh added to buffer