The pl values at both pHs 7.4 and 8.6 are the same. Lab results are routinely generated at pH 8.6. Why is it important to demonstrate identical pl values?
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- I need help with this problem. Compare the pH of propionic acid and nitric acid when they are dissolved in water at a concentration of 20 mM using the "Arrhenius Concept". Include:a balanced equation describing the acid-base reactions involvedThe calculation of the pKa for bothThe calculation of the two pH's (of propionic acid and nitric acid when they are dissolved in water at a concentration of 20 mM)and A calculation of the percent of dissociation of both propionic acid and nitric acid.The gibbs free energy ΔG are listed as the following:Nitric acid: -152 kJ/molPropionic Acid : -291 kJ/molPropionate: -361 kJ/mol4. Calculate the pH you would expect for a 0.15 M aqueous solution of each substance. - nitric acid - ascorbic acid - lithium hydroxide - methylamine (see Table 15.4, p. 682) I 5. Consider your work on the ascorbic acid solution in the previous problem. What would the equilibrium concentration of the conjugate (ascorbate, C,H;O6) be in the solution?The pKa of a weak acid (increases, decreases, is unaffected) if the equivalence point is increased because
- You are diligently doing an assignment when a question comes up that had a pH of -1. Is this likely a typo by a tired instructor, or is this number indeed possible? Explain clearly, using an example if need.D Consider the acid dissociation behavior of carbonic acid, H₂CO3. pka1 = 6.351 pka2 = 10.329 0 O co²- O H₂CO3 O HCO3 HO [CO²-] [HCO₂] c=0 = HO Calculate the ratio What is the predominant species present at pH 6.74? C=O [CO²-] [HCO3] HO pH at pH 10.25. 16-01-0 c=0 14At what pH will the concentration of a compound with a pK, 8,4 be 100 tímes greater in ita acidic form than in its basic form? Express your answer using one decimal place. pH= 7.9 At what pH will 50% of a compound with a pK, = 7.6 be in its basic form? Express your answer using one decimal place. pH = At what pH will the concentration of a compound with a pK = 4.6 be 10 times greater in its basic form than in its acidic form? Express your answer using one decimal place. pH = Submit Danunet Anenr
- What is the second most abundant species of ethylenediamine at pH 9.250? O H₂NCH₂CH₂NH₂ O HINCH₂CH₂NH H₂NCH₂CH₂NH Calculate the percentage of ethylenediamine in the predominant form at each pH. pH 6.250: pH 9.250: % %The pka of acid HX is 6.02, and the pka of acid HY is 3.76. We can conclude that the Kp value of base X (the conjugate base of HX) should be HY). than the Kp value of base Y (the conjugate base of greater than equal to less than More information is needed to make judgment.Put the following bases in order from weakest to strongest and explain why. Cute specific pKa values of conjugate acids to answer this question.
- A solution of a compound is treated with indicators and gives the following results. What is the approximate pH range of the solution? (Use the table provided to you in your lab manual.) Methyl violet - violet Thymol blue - yellow Methyl yellow - yellow Bromcresol green - green 6 to 7 O1 to 2 4 to 5I Normal 1 No Spac.. Heading 1 Heading 2 Title Styles Paragraph 5. Fill in the following table: [H3O"] РОН [OH'] ACID or BASE pH 7.21 9.84 x 10° M 3.25 2.64 x 102 M 2.49Use the References to access important values if needed for this question. The K, of a solution can be determined from the pKp using the equation: 10-pK, Kb Where: K = base dissociation constant a Use the rules for logarithms and exponents to solve for pKb in terms of Kp. NOTE: Capitalization counts. pK = %3D Submit