What is the relative proportions between a weak acid and its conjugate salt at the pKa?...

What is the relative proportions between a weak acid and its conjugate salt at the pKa? Use this proportion to describe why they work well as a buffer at this point.

Expert Solution

queen_honey_blossom answered 2 years ago

Find an appropriate buffer system (include the weak acid/base and conjugate base/acid salt) to make 1.0...

Find an appropriate buffer system (include the weak acid/base and conjugate base/acid salt) to make 1.0 M buffer at pH 7.3.

If pKa of weak acids are the following: pKa acetic acid = 4.75 pKa propionic acid...

If pKa of weak acids are the following: pKa acetic acid = 4.75 pKa propionic acid = 4.87 pKa acitric acid = 5.40 pKa of benzoic acid = 4.19 What is the order of acids with increasing acidity Determine the pH of the following A. 100 mL of benzoic acid solution 0.03M is mixed with 200 ml water B. 50 mL of sodium hydroxide solution 0.05 M is mived with 200 ml water

A buffer is prepared by combining a weak acid or base with its conjugate form. A...

A buffer is prepared by combining a weak acid or base with its conjugate form. A buffer is made using 0.1 M KH2PO4 and 0.1 M K2HPO4. Which component of the buffer is the acid and A)which is the conjugate base? B)write the equation for the reaction between the buffer and the strong acid,HCL? C)write the equation for the reaction between the buffer and the strong base,NaOH? d)if the pKa of the weak acid is 7.21, using the Henderson Hasselbach...

12. In a solution, when the concentrations of a weak acid and its conjugate base are...

12. In a solution, when the concentrations of a weak acid and its conjugate base are equal,…. [A] the system is not at equilibrium [B] the -log of the [H+] and the -log of the Ka are equal [C] the buffering capacity is significantly decreased [D] the buffering capacity is significantly increased [E] All of the above are true. 13. The concentration of iodide ions in a saturated solution of lead (II) iodide is ________ M. The solubility product constant...

Acetic acid and its conjugate base acetate can form an acid-base buffer. The pKa of acetic...

Acetic acid and its conjugate base acetate can form an acid-base buffer. The pKa of acetic acid is 4.75. How much 10.0 M HNO3 must be added to 1.00 L of a buffer that is 0.0100 M acetic acid and 0.100 M sodium acetate to reduce the pH to 4.85 ?

Calculation of Molar Ratios of Conjugate Base to Weak Acid from pH For a weak acid...

Calculation of Molar Ratios of Conjugate Base to Weak Acid from pH For a weak acid with a pKa of 6.0, calculate the ratio of conjugate base to acid at a pH of 5.0. Choice of Weak Acid for a Buffer Which of these com-pounds would be the best buffer at pH 5.0: formic acid (pKa 5 3.8), acetic acid (pKa 5 4.76), or ethylamine (pKa 5 9.0)? Briefly justify your answer. please show work thank you will rate.

Aniline hydrochloride, [C6H5NH3]Cl, is a weak acid. Its conjugate base is the weak base aniline C6H5NH2....

Aniline hydrochloride, [C6H5NH3]Cl, is a weak acid. Its conjugate base is the weak base aniline C6H5NH2. Assume 50.0 mL of 0.100 M C6H5NH3 is titrated with 0.125M NaOH. (C6H5NH3)Cl Ka = 2.40 X 10-5. What is the ph at 40.0ml Calculate the pH after 100.0 ml of NaOH has been added

50mL of 0.1M weak acid is titrated with 0.1 strong acid. Pka is 5.20 What is...

50mL of 0.1M weak acid is titrated with 0.1 strong acid. Pka is 5.20 What is the pH before the acid is added pH after adding 10mL of acid pH after 50 mL is added pH after 60mL is added Thank you for the help, I dont mind doing the amth, mainly need help with the equarions, thanks!

Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is...

Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is a preservative found in foods, medications, and personal hygiene products. Benzoic acid ionizes in water: C6H5COOH⇌C6H5COO−+H+ The pKa of this reaction is 4.2. In a 0.57 M solution of benzoic acid, what percentage of the molecules are ionized? Express your answer to two significant figures and include the appropriate units.

Identify the acid and conjugate base in each reaction. Calculate the pKA for each acid. List...

Identify the acid and conjugate base in each reaction. Calculate the pKA for each acid. List them in order from the strongest to weakest acid. HC2H3O2 + H2O --> H3O+ + C2H3O2-, KA = 1.7 x 10-5 HC7H5O2 + H2O --> H3O+ + C7H5O2-, KA = 6.3 x 10-5 HC6H4NO2+H2O --> H3O+ + C6H4NO2-, KA = 1.4 x 10-5

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