Table of Acids with Ka and pKa Values* CLAS * Compiled from Appendix 5 Chem 1A, B, C Lab Manual and Zumdahl 6th Ed. The pKa values for organic acids can be found in Appendix II of Bruice 5th Ed.

Use this acids and bases chart to find the relative strength of the most common acids and bases. This acid-base chart includes the K a value for reference along with the chemical's formula and the acid’s conjugate base. The acid and base chart is a reference table designed to make determining the strength of acids and bases simpler.

1. Strong acids are listed at the top left hand corner of the table and have Ka values >1 2. Acid with values less than one are considered weak. 3. The strong bases are listed at the bottom right of the table and get weaker as we move to the top of the table.

How is the Ka for H2PO4- determined from the pKa value? Ka = 10^-pKa. An acid has a pKa of 4.74. What's the Ka for this acid? 1.82 x 10^-5. At the extreme (high and low) ends of the plot of pH vs. log ( [HPO42-]/ [H2PO4-]), the data points may appear as though they are leveling off or deviating from linearity.

Acid Ionization Constants at 25 °C. Acid Formula K a. Acetic acid HC 2 H 3 O 2 1.8×10 –5 Acrylic acid HC 3 H 3 O 2 5.5×10 –5 Aluminum 3+ ion Al 3+ (aq) 1.4×10 –5 Ammonium ion NH 4 + 5.6×10 –10 Anilinium ion C 6 H 5 NH 3 + 1.4×10 –5 Arsenic acid H 3 AsO 4 6.0×10 –3 H 2 AsO 4 – 1.0×10 –7. HAsO 4 2– 3.2×10 –12. Arsenous acid H 3 AsO 3 6.6×10 –10 Ascorbic acid H 2 C ...

pH = - log[H+] [H+] = 10-pH pOH = -log[OH-] [OH-] = 10-pOH pH + pOH = 14 K w = 10-14 = K a ·K b pK a = -log K a K a = 10-pKa K a Table (Chang) (Acid) (Base) Ka ...

Note: A K a of "very large" indicates a strong acid.

(1) The Ka is determined by p K a is as follows:-The relationship between p K a and K a and

Nov 16, 2011 · The Ka of H2PO4 is 6.3 * 10^-8. The Ka of HS is 1.3 * 10^-13. Write a formula for the reaction of these substances and explain your results. Both are amphoteric. The formula is: H2PO4 + HS <--> HPO4 + H2S. I figured that the H2PO4 will act more like the acid in this particular situation because it has a higher value of Ka.

Mar 28, 2018 · Write the K a expression for H 2P O4− in water. Balanced chemical reaction: H₂PO₄⁻ (aq) + H₂O (l) ⇄ HPO₄²⁻ (aq) + H₃O⁺ (aq). or H₂PO₄⁻ (aq) ⇄ HPO₄²⁻ (aq) + H⁺ (aq). Ka is the acid dissociation constant, which quantifies the extent of acid dissociation (in this example H₂PO₄⁻) in water.