Lab Report ChM 145 Ionization

Lab Report ChM 145 Ionization - Ionization Constants of...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Ionization Constants of Weak Acids Dolores Dodson Sarah Clayton CHM 145-A Michele Tolbert Qualitative Data: Assigned Indicator Dye: Bromocresol Purple In test tube 6 the color was faint purple. This test tube marks the color change from yellow to purple. I looked up the pH range on a pH meter for the particular indicator used, Bromocresol purple, and the range that is typically calculated it between 5.2 and 6.8. The labquest used in the experiment recorded the pH for test tube 6 as 6.43. This number falls between the range that is often found for this indicator and will serve as the estimate for the pK of the dye. This is true because the Henderson-Hasselbalch equation states that pH=pK when there is equal amounts of dye. Quantitative Data: According to the plot the pK of H PO ₄⁻ determined from the liner best fit 6.43. The pH of the solutions is determined by the Henderson-Hasselbalch equation: pH=pK + log([HPO ]/[H PO ₄⁻ ])
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the exact number that was estimated for the PH value. The linear best fit determined the
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 3

Lab Report ChM 145 Ionization - Ionization Constants of...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online