There are many organic acids and bases in our cells, and their presence modifies the pH of the fluids inside them. It is useful to be able to assess the pH of solutions of acids and bases and to make inferences from measured values of the pH. A solution of equal concentrations of lactic acid and sodium lactate was found to have pH= 3.08. (a) What are the values of pKa and Ka of lactic acid? (b) What would the pH be if the acid had twice the concentration of the salt?

Q: What is the pH when 25% of the acid H3AsO4 (pKa = 2.22) has reacted with NaOH in a titration?

A: The reaction of H3AsO4 with NaOH results in the conversion of 25% of the acid into its conjugate…

Q: The pKb of the organic base nicotine (denoted Nic) is 5.98. Write the corresponding protonation…

A:

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: Write the proton transfer equilibria for the following acids in aqueous solution and identify the…

A: Proton transfer equilibria for the following acid in the solution and their conjugate base are given…

Q: D. Preparation of a Buffer from a Solution of a Weak Acid So far in this experiment the buffers that…

A: Pka=pH So B-=HB

Q: Calculate the PH Of Soution Prepared by adding D.Lomole of NADH to a Solution Containing D:20…

A:

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: 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: Outline the change in composition of a solution of the salt of a triprotic acid as the pH is changed…

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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: Explain why buffer potential is maximised at the pH that matches the pka of the weak acid of the…

A: Solutions- Buffer solution-A buffer solution (also known as a pH buffer or hydrogen ion buffer) is…

Q: Which is the correct Ksp expression for Cr(OH)3(s) dissolving in water?

A: we need to write the expression for Ksp for Cr(OH)3(s)

Q: What is the pH of the saturated solution of iron(II) hydroxide at about 98° С: = 5.0x10-13 KsP…

A:

Q: Neutralization of phosphate . Given that phosphoricacid (H3PO4) can give up three protons with…

A: Titration curve for H3PO4 versus NaOH

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: What are interionic interaction?

A: Interionic interactions:When an ion is surrounded by an ionic atmosphere which has a net opposite…

Q: What molar ratio of salt to acid would be required to prepare a buffer solution with a pH of 5.9?…

A:

Q: Using the concentrations 0.100M and 0.1766M, and the pKa of 3.752, what is the theoretical pH of a…

A: pKa = 3.752

Q: A hypothetical weak acid, HA, was combined with NaOH in the following proportions: 0,20 mol HA, 0,08…

A:

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

A:

Q: Calculate the pH at which pilocarpine (basic drug) starts to precipitate from a 2% w/v aqueous…

A: Solution- poOH=pKb + logConjugated acidbasegivehn pKa of pilocarpine…

Q: Most PFAAS have extremely low pka values (< 1), while oceans and rivers tend to be slightly basic…

A:

Q: 6. The pKa of lactic acid (CH3CH(OH)COOH) at 298 K is 3.85 write the equilibrium expression for this…

A: Lactic acid is a weak acid. The weak acid dissociates partially in the aqueous solution to give…

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

A:

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

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

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: Write the relevant chemical reaction and mass-balance expression for 0.1 M NaCl.

A: Ans : Mass balance Reaction :             Nacl (s)      →  Na+(aq)   +   Cl-(aq) To following the…

Q: Acetic acid was dissolved in water to a concentration of 0.10 mol.L-. The pKa of acetic acid is 4.8.…

A: a.) Acetic acid is an acid , so it would donate protons . For this we would write a chemical…

Q: What is the pH of a 0,0100 mol.dm–3 solution of a weak, monoprotic acid with Ka = 3,4 x10^-3 at…

A: We have to calculate the pH of solution.

Q: The value of Ka for nitrous acid 1HNO22 at 25 °C is given in Appendix D. (a) Write the chemical…

A: The acid dissociation constant is the equilibrium constant of the dissociation reaction of an acid…

Q: Aniline, C6H7N (molar mass = 93.13 g/mol), is a weak base that is used as a precursor in the…

A: 924 mg of aniline is dissolved in enough water to make a total volume of 1.00 L. pKb of aniline…

Q: State the limits to the generality of the expression for estimating the pH of an amphiprotic salt…

A:

Q: Given 0.75 M solutions of acetic acid (pKa = 4.76) and sodium acetate, what is the ratio of…

A: Given: PKa of acid = 4.76 pH of solution = 6.3

Q: Chitinase is a protein that breaks down chitin, a primary component of the cell wall in fungi,…

A: Given: Chitinase is a type of protein that breaks down the primary component of cell wall in fungi…

Q: Carbonic acid, H2CO3, undergoes the following acid base equilibria: H2CO3,=H*(aq) + HCO;¯(aq) =…

A: The relation between pKa and pH can be known as, ph = pKa + logsaltacid

Q: calculate

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

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: If 25,0 cm3 of the NH3 (concentration 0,10 mol∙dm–3) is titrated with the HCl (concentration 0,050…

A: Given data, Molarity of NH3=0.10mol/dm3=0.10mol/LVolume of NH3=25.0cm3=0.025LMolarity of…

Q: What is the pH when preparing a solution od 1 mol NaOH and 2 mol of solid NaH2PO4? The pKa's of…

A: Given: Moles of NaOH = 1 mol. Moles of NaH2PO4 = 2 mol.

Q: what is the pH of a 50 mg mL-1 solution of ascorbic acid (MW 176.1, pKa 4.17)?

A: Ascorbic acid dissociates in water as: C6H8O6+H2O→C6H7O6-+H+ -------(1)

Q: The pK of an acid is a measure of its proton-group-transfer potential. (a) Derive a relation between…

A: Consider an acid HA. The dissociation of HA is expressed as, HA⇌H++A- The expression of the…

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

A: Tyrosine

Q: Show how the composition of an aqueous solution that contains 30 mmol dm-3 tyrosine varies with pH.

A: Tyrosine is also known as 4-hydroxyphenylalanine is a non-essential amino acid. At neutral pH,…

Q: Aniline, C6H7N (molar mass = 93.13 g/mol), is a weak base that is used as a precursor in the…

A: The solution is given below -

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…