2. 1 M valine is present in 1 liter of water at (a) pH 7.5, (b) pH 2.5. For each functional group, calculate the ratio of molecules that are deprotonated to molecules that are protonated (for simplicity, assume that the functional groups are independent).
Q: What is the pH of a solution of Atropine (a weak base) if the concentration of nondissociated form…
A: Given : Weak base Atropine (Assuming B) pKb of base = 4.35 Solubility of base = 0.983 M And initial…
Q: The pKb of the organic base nicotine (denoted Nic) is 5.98. Write the corresponding protonation…
A:
Q: You wish to prepare an HC2H3O2 buffer with a pH of 4.24. If the pKa of is 4.74, what ratio of…
A: pH of a given solution is used to determine the concentration of H+ ions in the given solution so as…
Q: Calculate the volume of saturated Ammonium sulphate to be added to a 276ml of protein solution to…
A:
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: 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: Calculate the volume of saturated Ammonium sulphate to be added to a 112ml of protein solution to…
A: Here, we are performing dilution of given protein solution. So, C1V1 = C2V2 Where ,C1 and V1 are…
Q: Properties of a Buffer The amino acid glycine is often used as the main ingredient of a buffer in…
A:
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: You are conducting a biochemical experiment with an enzyme that has optimal activity at pH = 6.50.…
A: Buffers are solutions that are used in experiments to resist the change in pH. Carbonic acid is a…
Q: What will be the pH of a buffer solution containing an acid with a pKa of 5.4 with an acid…
A: We have to predict the pH of buffer solution.
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: What is the equivalence point pH of a 0.1M solution of phenylalanine that is fully titrated with…
A:
Q: Calculate k, the degradation rate constant, responsible for drug degradation in this solution (in…
A: According to the rate law, the rate of a reaction is dependent upon the concentration of the…
Q: Compare the size of the change in pH value when HCl and NaOH are added to water vs. the size of the…
A: Buffer solution : A buffer solution is an aqueous solution consisting of a mixture of a weak acid…
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: You are conducting a biochemical experiment with an enzyme that has optimal activity at pH = 10.50.…
A: Buffer Solution is a water solvent based solution which consists of a mixture containing a weak acid…
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: Of the two hydroxy organic compounds ROH and R’OH, the first one is basic and other is acidic in…
A:
Q: Answer the following questions. a. Determine the pH of the solution if you add 15 mL 0.25 M HCl to…
A: It is Based on concept of biomolecules and buffer solution. we have to calculate pH of the Arginine…
Q: 120 mg of codeine hydrochloride (CodHCl) is dissolved in 10.0 mL of water. Calculate the expected…
A: Since you have posted multiple completely unrelated questions, we are entitled to answer the first…
Q: Given the identity of the base, its concentration and pKb, determine the pH of a solution of the…
A: Whenever a weak acid and strong base reacts with each other than they form a weak acid strong base…
Q: A student is performing an acid-base extraction on unknown compounds, and she extracts the organic…
A:
Q: . What is the molecular basis for the observation that the overall charge on a protein becomes…
A: Proteins are the large polymeric compounds made up of monomeric units, namely amino acids. There are…
Q: 2. Phoebe was tasked to ensure that an enzyme responsible for keeping her species from extinction…
A:
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…
A:
Q: You wish to prepare an HC2H3O2 buffer with a pH of 5.14. If the pKa of is 4.74, what ratio of…
A: Given:pH = 5.14pKa = 4.74We need to find the ratio of C2H3O2⁻/HC2H3O2
Q: Given that C6H11COOH has a pKa = 4.8 and C6H11N + H3 has a pKa = 10.7, what pH would you make the…
A: The compounds need to be charged to be dissolved in water. C6H11COOH is charged in its basic form.…
Q: Examine the molecules below. Which of these molecules can not be described as an amphipathic…
A: Amphiphatic molecules are the molecules that has both polar andnon- polar parts. They have both…
Q: Write the Ksp expression for the sparingly soluble compound silver carbonate, Ag2CO3. Ksp =…
A: SOLUTION: Step 1: The solubility product is denoted with KSP. The solubility product of a substance…
Q: 2. Phoebe was tasked to ensure that an enzyme responsible for keeping her species from extinction…
A: given find buffer for store the enzyme At PH =10
Q: To establish 50% ammonium sulfate saturated solution, 314 g/l of salts should be added. Calculate…
A: It is given in question that solubility of salt is 314 g/L. This means 314 g of salt is soluble in…
Q: You will be dialyzing 2 mL egg white with a Glycine buffer. The buffer will be switched out 2.0…
A: The volume of egg white = 2 mL
Q: Calculate the pH of 1.25x10^-2 M of the decongestantephedrine hydrochloride if the pKb of ephedrine…
A: Ka value is calculated.
Q: What is the effect of pH on protein solubility? What is the isoelectric point (pI) of soy protein?
A: Proteins :- A protein is a naturally occurring organic compound, extremely complex substance…
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: According to the following equilibrium, CaC2O4(s) ⇌ Ca2+(aq) + C2O4 2-(aq) the addition of C2O4 2-…
A: A saturated solution is a solution that contains the maximum amount of solute that is capable of…
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 pK, values for the amino acid leucine (R = CH2CH(CH3)2) are pKa1 = 2.36 and pKa2 = 9.60. Fill in…
A:
Q: 2. Phoebe was tasked to ensure that an enzyme responsible for keeping her species from extinction…
A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…
Q: N-(2-hydroxyethyl)piperazine-N'-(2-ethanesulfonic A purified protein is in a Hepes acid) buffer at…
A:
Q: Based on the graph, the retention of 4-aminobenzoic acid is not affected changes in mobile phase pH…
A: In the ph (2-9) , 4-aminobenzoic acid remains in zwitterionic form and have both +ve and -ve end…
Q: At what pH is the formationof the acyl-enzyme complex most likely to occur. provide a point. Provide…
A: Acyl enzyme complex is an intermediate obtained in the substrate hydrolysis by some peptidases and…
Q: Select your two favorite amino acids. Draw them with correct stereochemistry and embed a picture of…
A: We have to do experiment with alannine and glycine. When they are encountered in aqueous solution…
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.
A: Phosphorous pentachloride has chemical formula PCl5 and it is a pale greenish-yellow solid color…
Q: Consider the compounds belowz show how Hinsberg's Method for Characterizing Primary, Secondary, and…
A: Hinsberg test is used to distinguish primary, secondary and tertiary amine.
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…
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 5 images
- describe the curve and why pH = pka at half equivalence pointA biochemical reaction takes place in a 1.00 ml solution of 0.0250 Mphosphate buffer initially at pH = 7.20 (as shown for pKas of phosphatespecies).(a) Are the concentrations of any of the four possible phosphate speciesnegligible? If so, identify them and explain your answer.(b) During the reaction, 3.80 μmol of HCl are produced. Calculate the finalpH of the reaction solution. Assume that the HCl is completely neutralizedby the buffer.Provide the chemical formulas and the names of the three predominant carbonic acid species indicated by arrows in the image below: Species 1 species 2 Species 3 Explain i) how you can determine the pH range at which a weak acid/conjugate base system will display buffering properties.ii) what is the reason/logic behind the rule applied in i)? and iii) indicate the pH ranges of the carbonic acid system based on the pka values provided above. Provide the chemical equilibrium that describes the carbonic acid buffer system that exists at pH 9.3. Clearly indicate the chemical formulas, identify the weak acid and it’s conjugate base, and the names of the chemical compounds.
- 1b) Suppose you decreased the pH of the biotin solution from 7.0 to 3.0 - what would happen to the ionizable group on a molecule of biotin as the pH shifted from 7.0 to 3.0? Briefly explain why you would expect that to happenProperties of a Buffer The amino acid glycine is often used as the main ingredient of a buffer in biochemical experiments. The amino group of glycine, which has a of 9.6, can exist either in the protonated form or as the free base , because of the reversible equilibrium In what pH range can glycine be used as an effective buffer due to its amino group? In a 0.1 m solution of glycine at pH 9.0, what fraction of glycine has its amino group in the form? How much 5 m KOH must be added to 1.0 L of 0.1 m glycine at pH 9.0 to bring its pH to exactly 10.0? When 99% of the glycine is in its form, what is the numerical relation between the pH of the solution and the of the amino group? Please answer all of these questions, especially C please write in detail.The first step in purifying the urine collected on the ISS is to treat every liter of urine with 20 mL of 1.0 M H2SO4. To simplify the calculations, lets assume that urine is water. a) What is the pH of a solution of 20. mL of 1.0 M H2SO4 added to 1.00 L water? To determine this, you can safely assume that 100% of the H2SO4 reacts to form H3O+ and HSO4- ions. Use pKa2 (1.92) to determine if any more protons are added to the solution from HSO4-.
- Draw the titration curve for serine and glutamic acid, starting at pH1, going to 14 andadding equivalents of baseIf the concentration of an acid in solution is 2.2 times larger than the concentration of its conjugate base, and the pH of the solution is 3.5, what is the pKa of the acid? Include the answer to 3 significant figuresWhich compound, FeCO3 or PbBr2, is more soluble in acid than in base? Why?
- Sketch a plot of the fraction of species, f, vs pH for Tyr. Show your calculations for several points on the plot. You want to calculate the fraction of the species for more than 3 of the points. pKa’s for Tyr is 2.24, 9.04, and 10.10.The state of ionization of a specific amino acid is directly influenced by the pH of the surrounding medium in which the amino acid is at that time. Use the amino acid lysine and show on a rough graphical outline the transition from completely protonated to completely deprotonated.What is the equivalence point pH of a 0.1M solution of phenylalanine that is fully titrated with NaOH?