Benzoic acid (C6H5C02H) has Ka =6.3 x 10-5  a) What is the value of Kb for the benzoate ion (C6H5C02-)?  b) What is the h30+ concentration of a O, 10 mol/dm3 solution of benzoic acid?  c) What is the pH of the solution in (b) above?

Q: Calculate the percent ionization of formic acid (HCO2H) in a solution that is 0.222 M in formic acid…

A: The pH of the solution is calculated in accordance with the Henderson-Hasselbach- equation.

Q: The base B has pKb  5.00. (a) What is the value of pKa for the acid BH? (b) At what pH is [BH] …

A: Handerson Hasselbalch equation –  Buffer solution is mixture of weak acid and its conjugate base.…

Q: The acid dissociation constant (Ka) of a 2.5 L weak acid has a value of 2.56 ×10^-4. Determine the…

A:

Q: Determine the Ka expression for the reaction below. NH4+ (aq)  +  H2O (l)   ⇄   NH3 (aq) +  H3O+…

A:

Q: Calculate the pH at 25 °C of a 0.75M solution of trimethylammonium chloride ((CH),NHCI ). Note that…

A:

Q: what is the pH of the ethanoic acid solution (CH3COOH) 0.15 M with Ka = 1.8 × 10-⁵? a) What will be…

A: Given  For CH3COOH , Ka = 1.8 x 10-5  pKa = -log Ka = -log ( 1.8 x 10-5 ) = 5 - 0.255 = 4.745  Moles…

Q: What fraction of ethane-1,2-dithiol is in the form H,A, HA and A? at a pH = 8.00?

A:

Q: Calculate the pH of a 0.10 mol/L solution of ascorbic acid, H2C6H6O6(aq) and the equilibrium…

A:

Q: The Ka of formic acid (HCHO2) is 1.8 x 10^-4. What is the pH of a 0.35M solution of sodium formate…

A:

Q: What is the mole fraction of HA at pH 3.00 given H₂A = H+ + HA Ka1 = 1.0e-3 HA H+ + A² Ka2 = 1.0e-9

A: Suppose the initial molarity of H2A taken = C M  The equation for the 1st dissociation of H2A(aq)…

Q: : Determine the pH of a .25 M CH3NH3Cl solution (Ka for CH3NH3+ = 2.3*10^-11)(Show the dissociation…

A: To Calculate pH , we would need to draw an ICE table and calculate concentration of H3O+. From this…

Q: Calculate the pH of a 0.355 M solution of propanoic acid, for which the Ka value is 1.30 x 10-5.

A: Given : concentration = 0.355 M               Ka = 1.30 × 10-5

Q: You have 0.500 L of an 0.250 M acetate buffer solution (i.e. [HC2H;O2] + [C2H3O2] = 0.250 M) at pH…

A: pH is used to determine the concentration of hydronium ion.

Q: 2. a. What is the ratio of H2PO4 to H3PO4 at a pH of3? Phosphoric acid, pKal =2.12, pKa2 = 7.21, and…

A: #2(a): H3PO4(aq) is a weak acid and H2PO4-(aq) is a conjugate base of the weak acid. Hence…

Q: (Q16) What is the pH of a solution that is 0.889 M in ethylammonium chloride (CH3CH2NH3CI)? The Kb…

A: Let us suppose concentration of salt is c, then, c=0.889 M (Given) Kb=5.6×10-4 pH = ?

Q: Calculate [OH] of a 1.00x10-2 M aqueous solution of ethylamine (C2H5NH2, Kb = 5.60x10-4). %3D 5.6e-6…

A:

Q: a) If the pH value of an aqueous solution of trimethylamine [(CH3)3N] is 10.75, what should be the…

A: Given,  pH of the solution = 10.75 molarity of the solution = ? Kb = 6.3 × 10-5 The balance chemical…

Q: If 100 mls of 0.02 M HCl added to 400 mls of 0.5 M glycine buffer at pH10.4, what is the resultant…

A: A buffer solution is the solution composed of acid and conjugate base in such a way so that the pH…

Q: Q2 : At 25°C, K = 3.40 x 10-3 S m-1 for 0.00100 M NH4OH. Values of Lo are: NH4C1 = 0.01497, NaOH…

A:

Q: Calculate the pH at 25 °C of a 0.98M solution of sodium benzoate (NaC,H,CO,). Note that benzoic acid…

A: The question is based on the concept of salt hydrolysis. sodium benzoate is the salt of weak acid…

Q: How many moles of LiCH3CH2CH2CO2 must be mixed with 0.1315 mole of CH3CH2CH2CO2H and diluted to…

A:

Q: B: Calculate the pH of 0.1 M from sodium acetate CH3CO2Na and hydrolysis percent ? if you know Ka=…

A:

Q: The Ka of formic acid (HCHO) is 1.8 x 10^-4. Calculate the pH with a solution that is 0.15 M in both…

A: Given information is as follows; Ka = 1.8×10-4 HCHO  and  KCHO = 0.15 M           Determination of…

Q: If the Ka of the conjugate acid is 7.68 × 10-4 , what is the pKb for the base?

A: Applying relationship between ka and kb Ka× kb= Kw

Q: A weak base (B) has a pKµ value of 6.08. At what pH is [BH*] = [B]? pH = What is the predominant…

A:

Q: Calculate the pH at 25 °C of a 0.67M solution of potassium acetate (KCH3CO₂). Note that acetic acid…

A:

Q: Calculate the pH of 0.045 C5H5N (Pyridine) K_b= 1.7 x 10^-9 for C5H5N

A: We will ionize pyridine , then draw ICE table to calculate pH of solution.

Q: What is the pH of a 0.430 M solution of C₅H₅NHBr (Kb of C₅H₅N is 1.7 × 10⁻⁹)?

A: pH= 1/2(pKb-logc) Here given Kb=1.7×10-9,hence pKb=-logKb=-log(1.7×10-9) given c=0.430 M

Q: Ethanoic acid is a weak acid pka value 4.74 at 298K. Calculate the pH value at 298K of: a 0.1M…

A:

Q: How much mL of BaSO4 will be recovered given the following: Solution A: Na2SO4(aq) = 0.01 M; V =…

A:

Q: Acid A with ka 3.5 x 10-5 is more acidic than acid B with ka 6.5 x 10-6

A:

Q: You have 0.500 L of an 0.250 M acetate buffer solution (i.e. [HC2H;O2] + [C2H3O2¯] = 0.250 M) at pH…

A: Given data is: pH of buffer = 3.5 Let Concentration of [HC2H3O2]  be x M and concentration of…

Q: Calculate the pH at 25 °C of a 0.26M solution of potassium acetate (KCH₂CO₂). Note that acetic acid…

A: Concentration of KCH3CO2 = 0.26 M pKa of HCH3CO2 = 4.76

Q: Determine the pH of a 0.10 M solution of sodium acetate (CH3COONa) at 25°C. (Ka of acetic acid = 1.8…

A:

Q: 14. Using the tiny pK, table below, answer these questions for each acid-base question below. |Add…

A: The substance having more pKa value is less acidic and more basic.The equilibrium of an acid – base…

Q: The Ka of formic acid (HCHO) is 1.8 x 10^-4. Calculate the pH with 0.15 M potassium formate (KCHO).…

A: The reaction of an acid with a base will result in the formation of salt and water. The salt formed…

Q: If 100 mls of 0.02 M HCl added to 400 mls of 0.5 M glycine buffer at  pH10.4, what is the resultant…

A:

Q: What is the pH of the ethanoic acid solution CH3COOH 0.15 M with Ka = 1.8 × 10-⁵? b) What will be…

A: Molar mass of sodium ethanoate= 82 g/mol nsodium ethanoate = 82g / (82 g/mol) = 1 mol Ka = 1.8 X…

Q: d. The Ka of acetic acid (found in vinegar) is 1.8×10-5. Then the pKa of formic acid is

A: Acid Dissociation constant :- The relative strength of an acid is determined by its dissociation.

Q: (Q16) What is the pH of a solution that is 0.737 M in ethylammonium chloride (CH3CH2NH3CI)? The Kb…

A: Answer: 5.44

Q: Calculate the pH at 25°C of a 0.59M solution of potassium cyanide KCN . Note that hydrocyanic acid…

A:

Q: 1. Calculate the mass of potassium hydrogen phosphate, K2HPO4 (FW = 174.18) and the mass of…

A: Given  Molarity of solution = 0.5 M Volume of solution = 250 ml

Q: If the Ka of the conjugate acid is 4.39 × 10-8 , what is the pKb for the base?

A: Acid dissociation constant  (Ka) and base protonation constant (Kb) can be mathematically expressed…

Q: If the pH value of an aqueous solution of trimethylamine [(CH3) 3N] is 10.75, what should be the…

A:

Q: Calculate the pH of a 0.41 M CH3COONa solution. (Ka for acetic acid = 1.8 ×10−5.)

A: The reaction is written below. CH3COO - + H2O ⇌ CH3COOH - + OH- The ICE table is shown below.

Q: If you mix equal molar quantities of NH3 (Kb = 1.8 x 10-5) and CH;CO2H (Ka = 1.8 x 10-5), the…

A:

Q: A) give 2 factories that affect the strength of the acid as R=(H3-x Cox C) changes from CH3 to CCI3…

A: The factors are given below

Q: Compute for the pKa of benzoic acid (Ka = 6.3 × 10-5).

A: Given acid dissociation constant (Ka) of benzoic acid = 6.3 × 10-5 acid dissociation constant (Ka)…