[Refer to the figure for the titration of malonic acid]
a) In the diagram above, indicate clearly the regions where the solution is a buffer.
b) What is the approximate value of pKa1 of malonic acid? (indicate on the diagram).
c) Is it feasible to quantitatively titrate both of the malonic acid endpoints separately? (Yes, No)
d) Give an approximate value of the ideal pKa of an indicator dye for determining the endpoints of the titration shown above.
Homework Answers
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[Refer to the figure for the titration of malonic
acid]
a) In the diagram above, indicate...
1. The potentiometric titration of 25.00 mL of sodium malonate (the conjugate base of malonic acid,...
1. The potentiometric titration of 25.00 mL of sodium malonate (the conjugate base of malonic acid, HOOCCH2COOH which has Kal -1.42x103 and Ka2 2.01x10 with 0.2041 M HCl gave endpoints at 13.01 mL and 26.08 mL. A) Sketch the titration curve (roughly, don't worry about exact pH values, just the general shape of the curve) and label each of the following points with the type of acid/base solution (i.e., is it a strong acid, a weak base, a buffer, etc.):...
The titration of Maleic Acid HOOC COOH CC Maleic Acid Hd 20 40 60 Volume of NaOH (mL) The curve above shows the titrat...
The
titration of Maleic Acid
HOOC COOH CC Maleic Acid Hd 20 40 60 Volume of NaOH (mL) The curve above shows the titration of 250 mL of 100 mM maleic acid using 1 M NaOH. a) How many titratable protons are present in this acid? [1 marks]. b) Indicate on the curve with a "O" the end point titrations of each titratable group. [1 mark] c) Indicate on the titration curve with a clear "X" each pKa value associated...
HOOC COOH Maleic Acid Hd 20 40 60 Volume of NaOH (mL) The curve above shows the titration of 250 mL of 100 mM maleic ac...
HOOC COOH Maleic Acid Hd 20 40 60 Volume of NaOH (mL) The curve above shows the titration of 250 mL of 100 mM maleic acid using 1 M NaOH. a) How many titratable protons are present in this acid? [1 marks). b) Indicate on the curve with a "O"the end point titrations of each titratable group. [1 mark) c) Indicate on the titration curve with a clear "X" each pKa value associated with these titratable protons and estimate to...
It's a weak acid strong base titration Experiment 4: Identification of an unknown acid by titration...
It's a weak acid strong base titration
Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
НООС СООН CEC H Η Maleic Acid PH 20 40 60 Volume of NaOH (mL) The curve above shows the titration of 250 mL of 100 mM m...
НООС СООН CEC H Η Maleic Acid PH 20 40 60 Volume of NaOH (mL) The curve above shows the titration of 250 mL of 100 mM maleic acid using 1 M NaOH. a) How many titratable protons are present in this acid? [1 marks]. b) Indicate on the curve with a "O" the end point titrations of each titratable group. [1 mark] c) Indicate on the titration curve with a clear "X" each pKa value associated with these titratable...
Refer to the titration curve above for 0.500 M acetic acid titrated with hydroxide ions. When...
Refer to the titration curve above for 0.500 M acetic acid titrated with hydroxide ions. When [CH3COOH] = 0.125 M and [CH3COO-] = 0.375 M, where would you plot the pH value? in Region 1 in Region 2. to the left of the midpoint in Region 2. to the right of the midpoint in Region 3 in Region 4
1. For each of the following, predict whether an aqueous solution of the salt would be...
1. For each of the following, predict whether an aqueous solution of the salt would be acidic, basic or neutral. Explain. a. Nacis b. NaF c. NHIS d. KHCO3 e. (CH3)2NH2NO31 2. What is the pH of a solution that is 0.060 M in potassium propionate (CH3CH2COOK) and 0.085M in propionic acid (CH3CH2COOH)? The Ka for propionic acid is 1.3x10-5.5 3. Suppose you need to prepare a buffer for a pH of 10.6. An acid-base pair (HA/A') to use has...
The figure above shows the titration curve of a weak triprotic acid, H_3A, titrated with a...
The figure above shows the titration curve of a weak triprotic acid, H_3A, titrated with a strong base, BOH. Based on the information in the figure and the pK_a values shown: a. What is the pH at point B? What is the pOH at point B? b. What is [H^+] at point C? What is [OH^-] at point C? c. What is the pOH at point D? What is the pH at point D? d. What is the value of...
can someone help me answer these 5 questions and figire this graph out please? Acid-Base Titration...
can
someone help me answer these 5 questions and figire this graph out
please?
Acid-Base Titration of a Weak Acid with a Strong Base: Determination of K. Introduction: You will be titrating a solution of a weak acid with 0.100 M NaOH, while monitoring the reaction using a pH meter. Weak acids have characteristic acid-ionization constants, K. The purpose of this lab is to use the titration to determine the value of this constant for the weak acid called “benzoic...
1. What is the definition of an 'equivalence point' in an acid/base titration? (1 point) 2....
1. What is the definition of an 'equivalence point' in an acid/base titration? (1 point) 2. In part one of the experiment, you will prepare the acid solutions being titrated from a stock solution. Describe how you will accurately prepare 10.00 mL of 0.100 M HCl solution using a 1.00 M HCl stock solution. In your response to this question, be very specific about the quantities of stock solution and deionized water to be used in the dilution and the...
1. The potentiometric titration of 25.00 mL of sodium malonate (the conjugate base of malonic acid, HOOCCH2COOH which has Kal -1.42x103 and Ka2 2.01x10 with 0.2041 M HCl gave endpoints at 13.01 mL and 26.08 mL. A) Sketch the titration curve (roughly, don't worry about exact pH values, just the general shape of the curve) and label each of the following points with the type of acid/base solution (i.e., is it a strong acid, a weak base, a buffer, etc.):...
The
titration of Maleic Acid
HOOC COOH CC Maleic Acid Hd 20 40 60 Volume of NaOH (mL) The curve above shows the titration of 250 mL of 100 mM maleic acid using 1 M NaOH. a) How many titratable protons are present in this acid? [1 marks]. b) Indicate on the curve with a "O" the end point titrations of each titratable group. [1 mark] c) Indicate on the titration curve with a clear "X" each pKa value associated...
HOOC COOH Maleic Acid Hd 20 40 60 Volume of NaOH (mL) The curve above shows the titration of 250 mL of 100 mM maleic acid using 1 M NaOH. a) How many titratable protons are present in this acid? [1 marks). b) Indicate on the curve with a "O"the end point titrations of each titratable group. [1 mark) c) Indicate on the titration curve with a clear "X" each pKa value associated with these titratable protons and estimate to...
It's a weak acid strong base titration
Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
НООС СООН CEC H Η Maleic Acid PH 20 40 60 Volume of NaOH (mL) The curve above shows the titration of 250 mL of 100 mM maleic acid using 1 M NaOH. a) How many titratable protons are present in this acid? [1 marks]. b) Indicate on the curve with a "O" the end point titrations of each titratable group. [1 mark] c) Indicate on the titration curve with a clear "X" each pKa value associated with these titratable...
Refer to the titration curve above for 0.500 M acetic acid titrated with hydroxide ions. When [CH3COOH] = 0.125 M and [CH3COO-] = 0.375 M, where would you plot the pH value? in Region 1 in Region 2. to the left of the midpoint in Region 2. to the right of the midpoint in Region 3 in Region 4
1. For each of the following, predict whether an aqueous solution of the salt would be acidic, basic or neutral. Explain. a. Nacis b. NaF c. NHIS d. KHCO3 e. (CH3)2NH2NO31 2. What is the pH of a solution that is 0.060 M in potassium propionate (CH3CH2COOK) and 0.085M in propionic acid (CH3CH2COOH)? The Ka for propionic acid is 1.3x10-5.5 3. Suppose you need to prepare a buffer for a pH of 10.6. An acid-base pair (HA/A') to use has...
The figure above shows the titration curve of a weak triprotic acid, H_3A, titrated with a strong base, BOH. Based on the information in the figure and the pK_a values shown: a. What is the pH at point B? What is the pOH at point B? b. What is [H^+] at point C? What is [OH^-] at point C? c. What is the pOH at point D? What is the pH at point D? d. What is the value of...
can
someone help me answer these 5 questions and figire this graph out
please?
Acid-Base Titration of a Weak Acid with a Strong Base: Determination of K. Introduction: You will be titrating a solution of a weak acid with 0.100 M NaOH, while monitoring the reaction using a pH meter. Weak acids have characteristic acid-ionization constants, K. The purpose of this lab is to use the titration to determine the value of this constant for the weak acid called “benzoic...
1. What is the definition of an 'equivalence point' in an acid/base titration? (1 point) 2. In part one of the experiment, you will prepare the acid solutions being titrated from a stock solution. Describe how you will accurately prepare 10.00 mL of 0.100 M HCl solution using a 1.00 M HCl stock solution. In your response to this question, be very specific about the quantities of stock solution and deionized water to be used in the dilution and the...
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