Titration Acid Base Lab - known as the equivalence point...

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Titration Curve of 25mL of 0.2500M NaOH with 0.2500M HCl 0 11.85 5 10.92 10 10.5 15 10.15 20 9.72 25 8.35 30 6.98 35 6.65 40 6.2 45 5.78 50 3.73 55 1.81 60 1.53 80 1.15 100 1 The regions where the slope of the graph is not changing are buffer zones where the presence of conjugate acid-base pairs are. Since there is little to no change in pH in these regions, the syste resists pH change due to the conjugate pair interaction. The pH decreases due to the addition of t strong acid HCl. Since more acidic solutions are lower in pH, its makes sense that as more HCl is the concentration of H+ ions increases, lowering the pH of the system. The large slope decreases because the conjugate pairs are completely converted by the conjugate acid. This happens at wha
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Unformatted text preview: known as the equivalence point (where the solution would start to change color with indicator). Th are multiple equivalence points that are multiples of the first equivalence point because at the seco equivalence point, enough acid has been added to neutralize base. Beyond the equivalence point the pH of the solution will continue to go to 0 as there will be no basic anions to keep the pH up. 20 40 60 80 100 120 2 4 6 8 10 12 14 on Curve of 25mL of 0.2500M NaOH with 0.2500 Column B Volume of HCl Titrant Added (mL) pH e tem the added, s occur at is ere ond ts,...
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Titration Acid Base Lab - known as the equivalence point...

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