pKa values are different in different solvents. For example, the pKa of hydrofluoric acid (HF) in water is 3.45, but the pKa of hydrofluoric acid in DMSO (dimethyl sulfoxide) is 15.0. Choose the best explanation for the difference

Q: Provide an equilibrium constant for this reaction. OLi H. Li-N H-N pKa - 23 pka - 36 A. 1059 В.…

A: This is an acid base reaction where HA is the acid and B is the base. A- is the conjugate base and…

Q: Calculate the pH of a buffer solution containing 10.0 cm3 of 0.100 mol dm–3 NaOH and 20.0 cm3 of…

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Q: Calculate pKa values from the following Ka’s and vice versa: a. Nitromethane, Ka = 5.0 x 10^-11 b.…

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Q: Consider the following data. For the acid:  HA- Ka = 7.46⋅10−87.46⋅10-8 Calculate the Kb for A2-.…

A: Kb is the base dissociation constant. The base dissociation constant is a measure of how completely…

Q: The Ka for an acid is 7.91 x 10-29. Calculate the pKa for this acid.

A: The pKa for the acid is to be calculated

Q: A monoprotic weak acid, HA, dissociates in water according to the reaction HA(aq) = H*(aq) + A¯(aq)…

A: Given, the dissociation equation for the weak acid, HA: HA (aq) ⇌ H+ (aq) + A- (aq) Given the…

Q: Ka for acetic acid is 1.8 x 10-5. What is the first digit of the pKa value for acetic acid?

A: Ka is a dissociation constant of acid Here the acid is given acetic acid Formula for pKa = -log ka…

Q: Use pka values to predict which of the following equilibria will favor the reactants.

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Q: ACID-BASE EQUILIBRIA AND SALT EQUILIBRIA (COMMON-ION EFFECT, BUFFER AND SOLUBILITY EQUILIBRIA) A…

A: The mixture of Acetic acid and sodium acetate will form acidic buffer solution  Give that…

Q: Determine what is wrong with the Ksp expression for Ba(OH)2 and correct it. [Ba(OH)2] Ksp [Ba*][OH…

A: as per Q&A guidelines of portal I solve first question because it comes under multiple question…

Q: For the second dissociation of H, CO3: HCO3(aq) + H,O=H;O) + COaq) + CO3(aq) (1) a. At what volume…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: a) ne solubility product expression Tollowing: II 1- Ksp = [ Al**]*[OH'J³ 2- Ksp = [Ca2] [Br'] 3-…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Calculate Ka values from the following pKa’s: (a) Acetone, pKa 5 19.3 (b) Formic acid, pKa 5 3.75

A: pKa = -log Ka Ka = 10-pKa   (a) Acetone, pKa = 19.3 Ka = 10-pKa Ka = 10-19.3 Ka = 5.01 x 10-20   (b)…

Q: Calculate Qsp for calcium fluoride (Ksp = 3.9 ×10–11) when 180.0 mL of a 7.95×10-3 M  solution of…

A: In a saturated solution, the molar solubility of salt is used to determine the solubility product.…

Q: propiophenone + excess Br2 + excess NaOH=

A: Given: Propiophenone + excess Br2 + excess NaOH

Q: Calcium fluoride has a Ksp of 3.2 x 10-11. Would you expect to see a precipitate if you mix 0.100 L…

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Q: Ka for hydrofluoric acid is 6.8 x 104. What is the first digit of the pK value for hydrofluoric…

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Q: beaker contains a total concentration of 0.33 molar of weak acetic acid with pKa=4.27 and pH=2.02.…

A: Initial concentration= 0.33 M pKa= 4.27  pH= 2.02

Q: The dissociation constant, ka, of a weak acid is 5.9 x 10-6. What is the pKa of the acid?

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Q: Diclofenac acid has low aqueous solubility (and thus is formulated as diclotenaC sodium. It is…

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Q: Percent variance for Kc for Fe3+ + SCN- Fe(SCN)2+ = 110%, the average value for kc = 186 Percent…

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Q: Show how the composition of an aqueous solution that contains 20 mmol dm-3 glycine varies with pH .…

A: Given data: [H3N-CH2-COOH] = 20 mmol dm-3 pKa1 = 9.60 pKa2 = 2.35 Calculation of Ka1 and Ka2: pKa1 =…

Q: The pKa values of the conjugate acids of 2-aminopyridine (6.71) and 4- aminopyridine (9.11) are as…

A: It is given that 2-amino pyridine conjugate acid has a pKa value of 6.71 and 4-aminopyridine…

Q: A newly discovered extremely basic polar amino acid has pka values of 2.37, 13.01, and 11.89 for…

A: Here we are required to find the overall charge over amino acid at the given pH=13.01

Q: Distinguish the terms end point and equivalence point.

A: Equivalence point comes before the end point. At equivalence point, the number of moles of titrant…

Q: The Ksp of BaSO4 is 1.7 x 10-10. Calculate the concentration of the Ba+2 and SO4-2.

A: Since you have posted multiple questions, we will solve first one for you. To get remaining…

Q: What is the pKa value of Tris-HCl?

A: The molecular formula of Tris-HCl is: NH2C(CH2OH)3 ·HCl

Q: 5. A mixture of 0.20 Macetic acid and 0.30 Msodium acetate is given. What the pH of the medium if…

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Q: Which conjugate acid/base pair could be used to create a pH 3.20 buffer solution with the largest…

A: Buffer works well when - pH = pKa Ratio of [Conjugate base] / [Acid] = 1:1

Q: 3-(N-Morpholino)-2-hydroxy-propanesulfonic acid (MOPSO) is a common buffer used in biology and…

A: b. Molar concentration of the added acid =0.015 mol500×10-3 L=0.03 mol/L

Q: What is the ratio of the concentration of acetic acid and acetate ions required to prepare a buffer…

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Q: escribe  the curve and why pH = pka at half equivalence point

A: pH is negative logarithm of Hydrogen ion concentration

Q: Complete the Ksp expression for Ag,CO3. Ksp 8.46 x 10-12 –

A: Ans

Q: Determine the dissociation constants for the acids. Express the answers in proper scientific…

A: We have to calculate the dissociation constant of acid.

Q: 1) Using the measured pH, calculate the concentration of H3O+ and OH- at the equivalence point.

A: As per regulations we are only supposed to answer only one question.

Q: A monoprotic weak acid, HA, dissociates in water according to the reaction HA(aq) = H*(aq) + A (aq)…

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Q: *D. Ksp = [Ag*]² · [SO4 1 %3D Ksp- pwidut/deacte.cauh una bulilor liguel. 2. If the gram solubility…

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Q: Most of the pKa values given in this text were determined in water. How would the pKa values of…

A: The strength of a chemical substance acidity is determined by its pKa value. It is actually the…

Q: SOLUBILITY PRODUCT PRINCIPLE Calcium phosphate (Ca3(PO4)2; MM = 310.18 g/mol), a large component of…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Calculate the Ksp of the following compounds, given their molar solubilities. (a) CuS, 7.33 × 10¬1º…

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Q: Sketch a titration curve for the amino acid cysteine, and indicate the pKa values for all titratable…

A: Cysteine is a polar uncharged amino acid containing a thiol group (SH), which on reaction with thiol…

Q: Determine the Ksp of J3(PO4)2 if its molar solubility in H2O is 7.78 x 10–10 M

A: Many ionic compounds are completely soluble. But in actual case, even insoluble compounds will…

Q: The un-ionized form of the weak acid HA does not absorb in the visible region. When it ionizes, its…

A: A question based on equilibrium concept, which is to be accomplished.

Q: Write the Ksp expression for Cu(OH)2 in terms of [Cu2+] and [OH–].

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Q: The dissociation constant (Ka) of a weak acid is 1.8 x 10, calculate the pKa of the this weak acid.…

A: Ka of weak acid = 1.8 × 10-5 pKa of weak acid = ?

Q: you'd like to weigh out acetic acid and sodium acetate (pka=4.75) to use as buffer system to study…

A: This would simply require the Henderson Hasslebech reaction, which states that when the pKa value of…

Q: Define pKa and provide at least one method for determining its value.

A: The pKa value is one method used to indicate the strength of an acid.

Q: Calculate Qsp for calcium fluoride (Ksp = 3.9 ×10–11) when 130.0 mL of a 6.05×10-3 M  solution of…

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Q: The equivalent conductance of a 0.0140N solution of chloroacetic acid is 109.0 at 250C. What is the…

A: The ionization constant (Ka) of chloroacetic acid has to be given,

Q: Determination of Ksp of CaCO3 based on the measured pH and the following equations: CaCO3 (s) Ca 2+…

A: Here in this question some informations are given (Concentration value of Ca2+and PH value of the…