The amino acid tyrosine has pKa = 2.20 for deprotonation of its carboxylic acid group. What are the relative concentrations of tyrosine and its conjugate base at a pH of (a) 7, (b) 2.2, (c) 1.5?

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Q: You dissolve 6.31 g of potassium formate in 250 mL of 0.25 M formic acid (HCOOH). This solution was…

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Q: What is the pH of a 0.35 M solution of trimethylamine, (CH3),N (Kb = 7.4 x 10 5)?

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Q: If you use 1.00 mole of a monoprotic weak acid (pKa = 5.00) and 0.90 mole of its conjugate base,…

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Q: What will be the pH of a buffer solution containing an acid with a pKa of 5.4 with an acid…

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Q: Given that the purity of ferrous ammonium sulfate hexahydrate (FeSO4.(NH4)2SO4.6H2O) is 98% (w/w),…

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Q: If the concentration of Sn2+ ions in a solution of Sn(OH)2 was measured to be (1.41x10^-3), what is…

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Q: Which of the following substances is likely to have the largest pK,? Select an answer and submit.…

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Q: The ionization constant Ka for nitrous acid is 4.6x10⁻⁴. What are the the pKa for nitrous acid and…

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Q: What is the pH of 0.836 M anilinium hydrochloride (C6H5NH3CL) solution in water, given that Kb for…

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Q: Calculate the pH of a 0.60 M solution of ethylamine(C2H5NH2, Kb = 5.6 x 10-4.)

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Q: What is the effect of pH on protein solubility? What is the isoelectric point (pI) of soy protein?

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Q: Why is rainwater naturally acidic, even in the absence ofpolluting gases such as SO2?

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Q: Calculate the molar concentration of a purified enzyme (MW 25000 Dal) in a solution of 0.10 g/ml of…

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Q: Calculate the pH of a 2.00 M Na2CO3 given that the pKa’s of the first and second dissociation of…

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Q: From the reaction CaCO3+CO2+H2O= Ca2+ + 2HCO3-   A.) Show how it affects the chemistry of water,…

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Q: 2. Consider the following ions: sulfate (SO, 2), acetate (C,H,O, '),hydrogen carbonate(HCO, '),…

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Q: calculate

A: ∆G°rxn = [ ∆G°(N2O4) ] - [ 2 • ∆G°(NO2) ]  ∆G°rxn = [ 99.8 kJmol-1 ] - [ 2 • 51.3 kJmol-1 ]  ∆G°rxn…

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Q: Calculate the fraction of intact H2PO3 molecules in an aqueous solution of phosphorous acid at (a)…

A: given:  pH for part (a) = 5 pH for part (b) = 9 The reaction during the dissocition of acid is:…

Q: Write down the structure of the amino acid tyrosine and explain whether you can use tyrosine as a…

A: Tyrosine

Q: Write the reaction of PCl5 with heavy water.

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A: Given  First acid dissociation constant of H2SO4 = Ka1 = 1 x 103  Second acid dissociation constant…

Q: What is the pH of a 0.500 M solution of trimethylamine (pKb = 4.13)?

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Q: what is the pKa of the acid?

A: Given :- pH of solution = 4.9  Concentration of conjugate base = x  Concentration of acid = 2.3 x…

Q: Determine the pH of each of the following solutions. (a) 0.829 M hydrazoic acid (weak acid with Ka =…

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