Histidine has ionizable groups with pKa values of 1.8, 6.0, and 9.2, as shown below (His 5 imidazole group). A biochemist makes up 100 mL of a 0.100 M solution of histidine at a pH of 5.40. She then adds 40 mL of 0.10 M HCl. What is the pH of the resulting solution?

Q: The measured pH of a 0.100 M solution of triethylamine (NEt3) is 11.68. What pKa of triethylammonium…

A: Given,molarity of triethylamine ( NEt3 ) = 0.100 MpH of the solution = 11.68

Q: The pka values of a compound with two ionizable groups are pk1 = 4.10 and pk2 between 7 and 10. A…

A: Given, pK1=4.10 pK2 = between 7 and 10 Calculating the values of pK2. By using the…

Q: A 3.81 g sample of alanine (C3H7NO₂), Kb = 7.4 x 10-5) was dissolved in 50.0 cm3 of water.…

A: Given that  concentration of HCl = 0.500 M  Mass of alanine = 3.81 g  Molar mass of alanine…

Q: An analytical chemist is titrating 230.5 mL of a 0.1500M solution of isopropylamine ((CH3), CHNH₂)…

A: Isopropylamine, (CH3)2CHNH2(aq) is a monoacidic weak base with pKb = 3.33 HNO3(aq) is a monoprotic…

Q: Explain qualitatively how you would prepare a buffer of phosphoric acid at a pH of 7. For phosphoric…

A: The question addresses the preparation of a buffer solution using phosphoric acid to achieve a…

Q: What is the pH of the solution when 25.0 mL of 0.50 M HCIO4 have been added to 150.0 mL of 0.20 M…

A: Given, Volume of HCIO4= 25.0 mLConcentration of HCIO4=0.50 MVolume of triethylamine = 150.0…

Q: The data below show how the pKa of Tris (Tris(hydroxymethyl)aminomethane) (a common buffer used in…

A: Answer:Equation of a straight line that passes through a point (x1) and (x2,y2) is:

Q: What is the pKa of an acid?  As the pKa value increases, does the acid strength increase or…

A: The pKa value is  method used for indicate the strength of an acid. pKa is the negative log of the…

Q: A solution of 0.101 M cysteine is titrated with 0.0253 M HNO3. The pK₁ values for cysteine are 1.70,…

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Q: In titrating 10 ml of 0.1 M neutral amino acid (pKal= 2, pKa2 = 8),the pH after the addition of 5 ml…

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Q: Strong base is dissolved in 665 mL of 0.600 M weak acid (K₁ = 4.09 × 10-5) to make a buffer with a…

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Q: What is the pH of a solution containing 1.316 mol L-1 of a weak acid with pKA = 7.47 and 0.521 mol…

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Q: Give typed solution A compound has two carboxyls and one aminium group. The pKas of the groups are…

A: A compound has two carboxyls and one aminium group. The pKas of the groups are 2.1, 4.5, and 9.1,…

Q: How the pH at the equivalence point is determined by the species present; why the pH at the midpoint…

A: pH is the measure of the acidic or basic nature of the substance. It is measured by the use of…

Q: What is the pH of a buffer that results when 5.46 mole of H3PO4 is mixed with 2.97 mole of NaOH and…

A: · Moles of H3PO4 = 5.46 mol· Moles NaOH = 2.97 mol· Volume of solution = 1.00 L· Ka1 = 7.5 × 10–3

Q: Calculate the volume, in liters, of 1.690 M KOH that must be added to a 0.112 L solution containing…

A: Given that,Molarity of  = 1.690 MVolume of solution = 0.112 LMass of glutamic acid = 9.27 gMolecular…

Q: Suppose a biochemist has 10 mL of a 1.0 M solution of a compound with two ionizable groups at a pH…

A: Given:Calculate the exact value of pK2. is a unit of measurement for a solution's acidity or…

Q: What is the molar concentration of H+ in a solution with a pH of 3.67

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

Q: Calculate the pH at25°C of a 0.37M solution of sodium propionate NaC2H5CO2. Note that propionic acid…

A: we have to calculate the pH of sodium propionate

Q: HA > H* + A d) A solution of an unknown acid has a Pka of 4.4. Calculate the concentration of the…

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

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Q: Calculate the volume, in liters, of 1.617 M KOH that must be added to a 0.111 L solution containing…

A: The relationship between pH and pKa can be represented as follows-            ......1Here, [HA] is…

Q: Write the Henderson–Hasselbalch equation for a solution of propanoic acid (CH, CH,CO,H, pKa = 4.874)…

A: In this question, a solution of propanoic acid is given whose pKa value is given. The pH value…

Q: A diprotic weak base (B) has pKp values of 3.510 (pKp1) and 6.143 (pKp2). Calculate the fraction of…

A: Given data: pKb1 = 3.510 pKb2 = 6.143    pH = 9.429 Formula used: pKa = 14 - pKb  pKa = -log [Ka] pH…

Q: Calculate the equivalent weight of Na2CO3 when it is titrated against HCl in presence of…

A: The Answer to the following question is- a) reaction Na2CO3 + HCl ⇔NaHCO3 + NaCl  Molar mass of…

Q: A solution of 0.148 M aspartic acid, the charge neutral form of the amino acid, is titrated with…

A: The given scenario involves a titration experiment in which a solution of aspartic acid (an amino…

Q: One gram of lysozyme from chicken egg white is added to 10 mL of a 10 mM phosphate buffer saline…

A: 1gm Lysoxyme =1/14307 mol = 0.00007mol

Q: To what pH must a solution be adjusted to cause >95% of TOTAc to be present as the neutral acetic…

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Q: Describe the preparation of 2 L of 85 mM phosphate buffer, pH 6.5, using 120 mM  NaH2PO4·6H2O and…

A: Given: total volume of buffer solution = 2 L Concentration of buffer solution = 85 mM Concentration…

Q: Glutamine (HQ) is a diprotic amino acid with Kal = 6.5 × 10-³ and K₂2 = 1.00 x 10-⁹. Determine the…

A: Answer :---- (a)

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: What is the pH of a 0.50 M weak acid solution. The pKa of the weak acid is 11.5. Report 2…

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Q: The state of ionization of a specific amino acid is directly influenced by the pH of the surrounding…

A: The state of ionization depends upon the pH of  the medium. Lysine is a basic amino acid having two…

Q: The pKa's of H3PO4 are 2.0, 7.0, and 12.5. Assuming you have the sodium salts of all of the ionic…

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Q: Suppose a biochemist has 10 mL of a 1.0 M solution of a compound with two ionizable groups at a pH…

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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: Buffer solution of weak base aniline (assuming B) and its conjugate acid HB+. pH of solution…

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

A: The pH for the solution of 2.00 M Na2CO3 is to be calculated. Given: pKa1 = 6.37 pKa2 = 10.32.…

Q: Methionine is one of amino acids and undergoes dissociate reactions as follows: H₂M HM + H+ Ka1 =…

A:

Q: The pka values of 4 acids are given below. Acid НА1 НА2 НАЗ НА4 pKa 4.76 3.45 7.63 5.23 Which of the…

A: More is the value of pKa weaker is the acid ,and vice versa.

Q: I have 3 moles of a monoprotonated base (there are four pKa values(pKa1=2.3, pKa2=4.6,pKa3=10.1,…

A: The chemical reaction for the monoprotonated base can be given as follows: HCl+B-→HB+Cl-;…

Q: Calculate pH at equilibrium for a solution of 0.015M Oxalic acid, with pKa1=1.27 and pKa2=4.28.…

A: Given,  Molarity of oxalic acid [ H2C2O4 ] = 0.015 M pKa1 = 1.27  pKa2 = 4.28

Q: Strong base is dissolved in 715 mL of 0.600 M weak acid (K₁ = 4.12 × 10-5) to make a buffer with a…

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Q: A 25.0 mL sample of a 0.1300 M  solution of aqueous trimethylamine is titrated with a 0.1625 M…

A:

Q: Ja In titrating 10 ml of 0.1 N HA (pKa-4),the pH after the addition of 7 ml 0.IN 10.1N 3 NaOH is О…

A: Go through the solution provided

Q: What is the charge of the predominant form of phosphoric acid at pH=3.00 pKa 2.15, pKa27.20, pK=…

A: Given: pH = 3.00