The pH of a 0.112 M ethylamine is 11.80. Find by showing your computations the pKb for ethylamine.

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: Complete the following three tasks below. a. Find the approximate pKa value for each compound in the…

A: Ionic compound ===> Water soluble Non-ionic compound ===> Organically soluble

Q: Calculate the pH and the percentage of ionization of 30 grams of sodium glycolate (C2H3O3Na) in 20…

A: Sodium glycolate(C2H3O3Na) is a conjugate base of glycolic acid(HC2H3O3). The Ka of glycolic…

Q: What fraction of iminodiacetic acid is in each of its four forms (H, A H,A, HA, A) at pH 3.357? The…

A: pH=3.35=-log [H+]or, [H+]=10-3.35=4.47×10-4

Q: The Henderson-Hasselbalch equation: a. relates the pH of a solution to the pKa and the…

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Q: What is the pKb of the conjugate base of a weak acid that has a pKa equal to 3.52? (temperature is…

A: Given that : pKa = 3.52  pKb = ?

Q: Values of K, for Some Common Weak Bases Name Formula Ammonia NH3 CH,NH, Methylamine Ethylamine…

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Q: What is the pKb of the conjugate base of a weak acid that has a pKa equal to 5.29 at 25ºC?

A: To get the pKb of the base (B) you MUST subtract the pKa from 14. The reason for this is that the…

Q: Determine the pH of (a) a 0.40 M CH3COOH solution and (b) a solution that is 0.40 M CH3COOH and 0.20…

A: a) CH3COOH dissociates in the solution as:                              CH3COOH⇌CH3COO-+H+Initial…

Q: The dissociation constant of ethanolamine is 2.77 x 10 – 5 at 25 °C. Calculate its pKb value.

A: Given data: The dissociation constant of ethanolamine = 2.77 x 10 – 5. To find: The pKb value.…

Q: Using the known value for the Ka for acetic acid (1.76x10^-5),calculate the expected ph of an acetic…

A: Acetic acid, CH3COOH, is an organic acid. It is a weak acid with Ka of 1.76 x 10-5. It is a…

Q: Please check my answers and help me with question iii.

A: Given:Concentration of acetic acid (M1) = 0.100Concentration of methyl amine(M2) =?Volume of acetic…

Q: The equilibrium constant for the proton transfer reaction of benzoic acid is 6.4 x 10-5. Calculate…

A: Equilibrium constant = 6.4  10-5. Concentration of acid solution = 5.0 × 10-2 M  Concentration of…

Q: Four tablet samples (1.6308 g) which contain acetylsalicylic acid were dissolved in a 100 mL…

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Q: Write the Ksp expression for the sparingly soluble compound lead phosphate, Pb3(PO4)2. Ksp =…

A: a) Pb3(PO4)2  dissociates in the solution as: Pb3(PO4)2(s)⇌3Pb2+(aq)+2PO43-(aq) Since Pb3(PO4)2 is a…

Q: Given the following information: hydrocyanic acid HCN Ka = 4.0×10-10 diethylamine (C2H5)2NH Kb =…

A: Acid and base react with each other to form salt and water . This reaction is known as…

Q: A 20 ml solution of 0.1 M glycine hydrochloride has been prepared. How many moles of the weak acid…

A: Given,  Molarity of glycine hydrochloride (say HA) = 0.1 M  Volume of glycine hydrochloride = 20 mL…

Q: A particular solution is 0.05M with respect to ethanoic acid and 0.2M with respect to sodium…

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Q: Guanine, as it would appear at physiological pH, is shown below. One of the pKas of guanine, which…

A: The protonated form at N7 is =NH+- The deprotonated form at N7 is =N- pKa of =NH+ is, pKa = 2.4

Q: Calculate the pH for a mixture of one mole of benzoic acid and one mole of sodium benzoate. The pKa…

A: Given: pKa of benzoic acid = 4.2 Mole of benzoic acid = 1 Mole of sodium benzoate = 1

Q: Using the table of the weak base below, you have chosen Pyridine as your weak base in the buffer…

A: Given: The buffer solution is of weak base pyridine.

Q: 9. Phosphotyrosine (shown below) has four ionizable functional groups (pK1 = 2.5, pKR1 = 2.1, pKr2 =…

A: a) Given is the phosphotyrosine molecule, with four ionizable groups.

Q: To what final concentration of NH3 must a solution be adjusted to just dissolve 0.035 mol of NiC2O4…

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Q: Using the table of the weak base below, you have chosen Aniline as your weak base in the buffer…

A: Given: The weak base used is aniline.

Q: 2. Phoebe was tasked to ensure that an enzyme responsible for keeping her species from extinction…

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Q: ubjected to pH analysis using a pH meter, the first is analysed using 1:1 soil:water ratio and the…

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Q: Write the equilibrium-constant expressions and obtain numerical values for each constant in (a) The…

A: The acids are the compounds that lose H+ and bases are the ones that accept H+. The acidic salt also…

Q: 3. Calculate the pKa value of hydroxylammonium cation (HO-H3N*)(protonated on nitrogen hydroxyl…

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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 acid-dissociation constant for benzoic acid (C6H5COOH) is 6.3×10−5. Part A Calculate the…

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Q: Another phosphate buffer system known as the Phosphate buffer system operates in the internal fluids…

A: Buffer is a solution that tends to resist the change in pH of solution when small amount of acid or…

Q: Direction. Write your answer on a separate sheet of paper. For items involving calculation show your…

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Q: Outline the dissociation reactions for carbonic acid and list the electrical charges of protonated…

A: In this question, we have to write the dissociation reactions for carbonic acid and list the…

Q: Given that HO(CH2)2COOH has a pKa = 4.5 and HO(CH2)2 NH3 has a pKa = 9.5, answer the following: %3D…

A: Solubility of a compound is based on the principle of 'like dissolves like.' Water is a polar…

Q: Calculate the pH of 1.25x10^-2 M of the decongestantephedrine hydrochloride if the pKb of ephedrine…

A: Ka value is calculated.

Q: A physician wishes to prepare a buffer solution at pH = 3.82 that efficiently resists changes in pH…

A: Given, that a physician wishes to prepare a buffer solution at pH=3.82 that efficiently resists…

Q: 2. Phoebe was tasked to ensure that an enzyme responsible for keeping her species from extinction…

A: Buffer solution is mixture of weak acid and salt of weak acid or weak base and salt of weak acid. It…

Q: The pH of a saturated soloution of magnesium hydroxide, Mg(OH)2, (milk of magnesia) was found to be…

A: We have to predict the Ksp of salt.

Q: Acetic acid (H-C2H3O2) has a Ka of 1.8 x 10-5 . Write the equation associated with this Ka value.…

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Q: 1. Many dyes and pigments are organic molecules which vary in their relative polarities. Look up and…

A: Answer 1: Introduction: Dyes are usually organic molecules which gives specific colors. They are…

Q: What is [H3O+] of a solution that has pH = (3.10x10^0)? Enter your answer in scientific notation…

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Q: Using the table of the weak base below, you have chosen Methylamine as your weak base in the buffer…

A: Kb is the dissociation constant of a base. Calculations for pKb have been done in the following…

Q: A proportion of fentanyl is known to be lost to IV infusion bags made from PVC on storage and this…

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Q: In the laboratory, a general chemistry student measured the pH of a 0.590 M aqueous solution of…

A: Given: The concentration of ethylamine in the aqueous solution is 0.590 M. The pH of the solution is…

Q: Calculate the concentration of free Ca²⁺ in a solution of 0.10 M CaY²⁻ at pH 10.00. (K= 5.0 × 10¹⁰)…

A: 0.10 M CaY2- solution has a concentration of 0.10 M at pH 10.00 .We have to calculate the…

Q: For an acid HA with a pKa of 5.2, what is the ratio of the concentration of the conjugate base to…

A: The dissociation reaction of acid HA can be written as  => HA ------> H+ + A-  Conjugate base…

Q: A 0.022 2 M solution of HA is 0.15% dissociated. Calculate pKa for this acid.

A: Acid is the substance that gives proton while the base is the substance that gives hydroxide ion in…

Q: a) Identify the type of the followings surfactants. CH3 R-S-o M R-N-CH2CH2-C-o CH3 (ii) (i) b) Which…

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