3. The pKa,1 and pKa,2 of ortho and para isomers of phthalic acid (diprotic acid) are shown below: Provide an explanation on the differences of their pKa values.
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3. The pKa,1 and pKa,2 of ortho and para isomers of phthalic acid (diprotic acid) are shown below:
Provide an explanation on the differences of their pKa values.
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- 3. The pKa1 and pKa,2 of ortho and para isomers of phthalic acid (diprotic acid) are shown below: pKa1 pKa2 phthalic acid terephthalic acid 2.98 5.28 3.51 4.82 CO2H CO2H HO2C phthalic acid terephthalic acid Provide an explanation on the differences of their pKa values.The pK,, and pK, 2 of ortho and para isomers of phthalic acid (diprotic acid) are shown below: pK 2 5.28 pK a.1 phthalic acid 2.98 terephthalic acid 3.51 4.82 ÇO2H .CO2H .CO2H HO2C phthalic acid terephthalic acid Provide an explanation on the differences of their pK, values.Phosphoric acid (H3PO4) has 3 dissociable protons with the pKa values shown. Which form of phosphoric acid predominates in a solution at pH 4? Explain. Acid pKa H3PO4 2.14 H2PO4- 6.86 HPO42- 12.4
- Benzoic acid has a pKa = 4.20 at a pH of 6.20 the ratio [A-]/[HA] is what? O 1:100 1:50 1:10 1:1Molecule A is C6H9O2F and an aqueous solution of 0.0130 M of molecule A has a pH of 1.0 . Calculate the pKa. Use at least 2 sig figs and no scientific notation.Suppose you made a mistake in Ag group analysis, If instead of 6M HCl you used 6M H2SO4 what will you observe? Can you continue from that point on to separate the cations ?How?Explain
- B) What is the pH at the equivalence point? C) Give the Ka and pKa value of the acid. Explain.Phosphoric acid is a tri-acid. It is often associated to biological molecules (i.e. proteins, lipids) in the form of phosphate group. Its ionisation state depends on the pH of the solution and of its pKa values. Data: pka₁ = 2.1; pKa₂ = 7.2 ; pka3 = 12.4 1- What are the forms present at physiological pH (7.4) ? 2- Indicate which form is the most prominent.provide an explanation of the graphs (a) and (b) the relationship of the biological activity of the drug with acid/base conditions (a) graph of the relationship between changes in pH and biological activity of weak acids and bases Weak Acid Weak Base Biology Activities pH (b) Relationship between antibacterial activity (Log 1/ C) against Escherichia coli and the pKa value of the sulfonide derivatives Log 1/C pka
- The pKa values of 4 acids are given below. Acid HA1 HA2 HA3 HA4 pKa 4.76 3.45 7.63 5.23 Which of the following solutions does have the highest pH? Choose one option only. Options: a. 0.30 M A2- (aq) (conjugate base of HA2) b. 0.30 M A3- (aq) (conjugate base of HA3) c. 0.30 M A1- (aq) (conjugate base of HA1) d. 0.30 M A4- (aq) (conjugate base of HA4) e. All the 0.30 M bases in this question have the same solution pH.Which of the following best represents the structure of an amino acid in basic solution (pH=11)?If the PI does not agree with the IRE findings they can request:
