escribe  the curve and why pH = pka at half equivalence point

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: Consider the titration of 30 mL of 0.10 M H2CO3 (H2A) with 50 mL of 0.10 LiOH. What would the pH be…

A: In this question, we want to determine the pH of the Solution.  You can see details Solution step by…

Q: Some K2SO3 and KHSO3 are dissolved in 150.0 mL of solution and the resulting pH is 7.40. Which is…

A: Given :

Q: •The pKa for acetic acid is 4.756 and the pKa for NH4+ is 9.245. What pH do you expect for the…

A: To determine the expected pH of a solution containing equal concentrations of acetic acid (CH3COOH)…

Q: A certain indicator, HA, has a K, value of 5.0 x 10-7. The protonated form of the indicator is red…

A:

Q: hosphoric acid is a triprotic acid with the pK, values pKa1 = 2.148, pK2 = 7.198, and pK3 = 12.375.…

A: The question is based on the concept of buffer solution.   A buffer is a solution which resist any…

Q: A 11 mM solution of a compound with a pKa = 6.5(1L total) has a pH of 7.5.If a biochemist adds 9…

A:

Q: Acetic acid has a pKa of 4.76. Starting with a 1.0 M solution of sodium acetate, and a 1.0 M…

A: Given,Molarity of acetic acid = 1.0 MMolarity of sodium acetate = 1.0 MpKa of acetic acid =…

Q: Which acid would you choose to combine with its sodium salt to make a solution buffered at pH 4.25?…

A: To choose the best acid, look for it's .The acid with closest to the given is the best choice.

Q: Answer 7c

A: The objective of the question is to calculate the .

Q: What is the percent of the protonated species in HA/A- buffer at pH 10? pKa of HA = 9.20

A: Answer :---- Given :-pH = 10pKa = 9.20The Henderson-Hasselbalch equation is :--pH = pKa +…

Q: pH 14 12 10 8 6 4 2 0 0 10 Acid-Base Titration Curve equivalence point: VNaOHE half-equivalence…

A: Weak acid vs strong base titration.

Q: What will be the pH of a buffer solution containing an acid with a pKa of 2.2 with an acid…

A:

Q: The chief chemist of Victory Vinegar Works, Ltd., inter- views two chemists for employment. He…

A: The reaction of acid and base in the presence of an indicator in the laboratory is called titration.…

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 relative masses of dimethyl amine and dimethyl ammonium chloride do you need to prepare a…

A: Given that, the pH of a buffer solution of dimethyl amine and dimethyl ammonium chloride is 10.50.…

Q: What is the pH of a buffer that is 0.120 M in chloroacetic acid(ClC2H3O2H) and 0.800 M in potassium…

A:

Q: An employer is interviewing 4 applicants for a job as a laboratory technician and asks each of them…

A: Buffer solution is defined as a solution that oppose changes in pH while adding little amount of…

Q: Ka = 1.8 × 10–5 for the ionization of HC2H3O2(aq). Determine the [HC2H3O2]/[C2H3O2–] ratio that will…

A:

Q: The pKa value for H2CO3 is 6.38. What mole ratio of KHCO3 to H2CO3 is needed to prepare a buffer…

A: Given Buffer is  H2CO3 + KHCO3 Given that , pKa of H2CO3 = 6.38 pH of the buffer = 6.18 We need to…

Q: An analytical chemist is titrating 90.6 mL of a 0.2800 M solution of diethylamine ((C₂H₂)₂NH) with a…

A:

Q: Phosphoric acid is a triprotic acid with the p?apKa values p?a1=2.148pKa1=2.148,  p?a2=7.198…

A:

Q: You wish to prepare an HC2 H3 O2 buffer with a pH of 4.14. If the pKa of HC2H3 O2 is 4.74, what…

A: Given :-   pH of buffer solution = 4.14  pKa value for HC2H3O2 = 4.74  To calculate :-  Ratio of…

Q: In the titration of 100.0mL of a 0.0500M solution of acid H3A (Ka1=1.0*10-3, Ka2=5.0*10-8,…

A: H3A Is a triacid. The titration of H3A  by NaOH shows 3 equivalence points. The chemical reactions…

Q: The concentration of total phosphorous (HPO4^2- and H2PO4^-) found in a blood sample is determined…

A: Henderson - hasselbach equation enables the calculation of pH of a buffer solution made by mixing…

Q: You have 0.500 L of an 0.250 M acetate buffer solution (i.e. [HC₂H₃O₂] + [C₂H₃O₂⁻] = 0.250 M) at pH…

A: How many mL of 1.000 M NaOH must be added in order to change the pH of acetate buffer to 5.23 from…

Q: Calculate the ratio of NaCH3COO to CH3COOH (Ka = 1.8 x 10-5) required to create a buffer at pH 5.00.

A: The pKa is calculated as follows,

Q: Chromium(III) hydroxide is amphiprotic.   Write a balanced chemical equation showing how an…

A: Amphoteric substances are those which can react with acid as well as base. We have to write the…

Q: Describe 3 methods of pH determination.

A:

Q: You are asked to prepare a 200.0 mL buffer solution of pH 8.52 from the following hypohalous acids:…

A: We'll first calculate the pKa of each acid.

Q: A buffer was created using ascorbic acid and sodium ascorbate. What is the pH of the buffered…

A: Given,H2C6H6O6 = 5.5 × 10-5 MHC6H6O6-1 = 3.5 × 10-4 MKa = 8.00 × 10-5Required,…

Q: You have 0.500 L of an 0.250 M acetate buffer solution (i.e. [HC₂H₃O₂] + [C₂H₃O₂⁻] = 0.250 M) at pH…

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