Homework Answers
Question 1.
Trial 1.
[Oxalic acid] = C = 0.209 g/(90 g/mol) * 1000/32 L = 0.07257 M
Initial pH = 1/2 (pKa - LogC) = 1/2 (3.2 - Log0.07257) = 2.17
This almost matches to the experimental value (2).
Trial 2.
[Oxalic acid] = C = 0.203 g/(90 g/mol) * 1000/31 L = 0.07276 M
Initial pH = 1/2 (pKa - LogC) = 1/2 (3 - Log0.07276) = 2.07
This almost matches to the experimental value (2).
Question 2.
When a weak acid is titrated with a strong base, at the equivalence point, the salt develops basic character, as a result, its pH is greater than 7.
Add Answer to:
Based on the following information...
please answer A. B. and C.
TITRATION OF A WEAK ACID...
Answer the following questions using the graph and labeling the equivalence point and half-way point. Trial...
Answer the following questions using the graph and labeling
the equivalence point and half-way point.
Trial 1 Tri Mass of oxalic acid 0.2099 M: pH at equivalence point PH at vo Volume of titrant added at equivalence point Volume of titrant added half-way to equivalence point pH at half-way point ha ра pKa of oxalic acid Ka of oxalic acid(5 pts) Calculations TITRATION OF A WEAK ACID TRIAL #1 008 PH 30 O VOLUME OF BASE ADDED
Answer the following questions using the graph and labeling the equivalence point and half-way point. Trial...
Answer the following questions using the graph and labeling the equivalence point and half-way point. Trial 2 Mass of oxalic acid 02039 pH at equivalence point srdo sdt seU Volume of titrant added ot 1otsoibni at equivalence point Volume of titrant added 9orliden viups half-way to equivalence point pH at half-way point uit od pKa of oxalic acid Ka of oxalic acid (5 pts) Colho is R4he soluthon Calculations TITRATION OF A WEAK ACID TRIAL #2 12 6 4 2...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.22 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH added pH Half-way Point 18.34 4.06 Equivalence point 36.68 8.84 How many moles of NaOH have been added at the equivalence point? mol What is the total volume of the solution at the equivalence point? mL During the titration the following...
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...
Using the following pH curve for the titration of a weak acid with a strong base,...
Using the following pH curve for the titration of a weak acid with a strong base, if the pH at half-equivalence point is 4.75, what is the Ka of the weak acid? Equivalence Point Half-equivalence Point - 8 12 14 Volume of base added (in ml) 20 1.78 x 10-4 1.77 x 10-4 1.77 x 10-5 1.78 x 10-5
Titration of weak acid with strong base pre-lab Answers can only be entered/graded between 2019-10-24 and...
Titration of weak acid with strong base pre-lab
Answers can only be entered/graded between 2019-10-24 and 2019-10-29 A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.12 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH PH added Half-way Point 17.97 3.66 Equivalence point 35.938.65 How many moles of NaOH have been added at the equivalence point? r mol correct...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.18 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH added PH Half-way Point 19.03 3.54 Equivalence point 38.05 8.57 How many moles of NaOH have been added at the equivalence point? mol incorrect 0/1 What is the total volume of the solution at the equivalence point? ImL incorrect 0/1 During...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.24 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH added pH Half-way Point 18.73 3.60 Equivalence point 37.45 8.59 How many moles of NaOH have been added at the equivalence point? mol What is the total volume of the solution at the equivalence point? mL During the titration the following...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.18 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH added pH Half-way Point 18.77 3.83 Equivalence point 37.54 8.73 How many moles of NaOH have been added at the equivalence point? mol What is the total volume of the solution at the equivalence point? mL During the titration the following...
Use the titration curve of a weak acid with a strong base below to answer the...
Use the titration curve of a weak acid with a strong base below to answer the following questions. Identify the Equivalence Point of Titration and label it on the titration curve below. (ii) What is the Titrant (iii) From the graph, what is the [H^+] and the volume of NaOH used to reach the equivalence point. (iv) Calculate the [OH^-] at the equivalence point (v) What is the pKa of the acid used for titration? (vi) Calculate the Ka of...
Answer the following questions using the graph and labeling
the equivalence point and half-way point.
Trial 1 Tri Mass of oxalic acid 0.2099 M: pH at equivalence point PH at vo Volume of titrant added at equivalence point Volume of titrant added half-way to equivalence point pH at half-way point ha ра pKa of oxalic acid Ka of oxalic acid(5 pts) Calculations TITRATION OF A WEAK ACID TRIAL #1 008 PH 30 O VOLUME OF BASE ADDED
Answer the following questions using the graph and labeling the equivalence point and half-way point. Trial 2 Mass of oxalic acid 02039 pH at equivalence point srdo sdt seU Volume of titrant added ot 1otsoibni at equivalence point Volume of titrant added 9orliden viups half-way to equivalence point pH at half-way point uit od pKa of oxalic acid Ka of oxalic acid (5 pts) Colho is R4he soluthon Calculations TITRATION OF A WEAK ACID TRIAL #2 12 6 4 2...
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...
Using the following pH curve for the titration of a weak acid with a strong base, if the pH at half-equivalence point is 4.75, what is the Ka of the weak acid? Equivalence Point Half-equivalence Point - 8 12 14 Volume of base added (in ml) 20 1.78 x 10-4 1.77 x 10-4 1.77 x 10-5 1.78 x 10-5
Titration of weak acid with strong base pre-lab
Answers can only be entered/graded between 2019-10-24 and 2019-10-29 A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.12 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH PH added Half-way Point 17.97 3.66 Equivalence point 35.938.65 How many moles of NaOH have been added at the equivalence point? r mol correct...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.18 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH added PH Half-way Point 19.03 3.54 Equivalence point 38.05 8.57 How many moles of NaOH have been added at the equivalence point? mol incorrect 0/1 What is the total volume of the solution at the equivalence point? ImL incorrect 0/1 During...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.24 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH added pH Half-way Point 18.73 3.60 Equivalence point 37.45 8.59 How many moles of NaOH have been added at the equivalence point? mol What is the total volume of the solution at the equivalence point? mL During the titration the following...
A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.18 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH added pH Half-way Point 18.77 3.83 Equivalence point 37.54 8.73 How many moles of NaOH have been added at the equivalence point? mol What is the total volume of the solution at the equivalence point? mL During the titration the following...
Use the titration curve of a weak acid with a strong base below to answer the following questions. Identify the Equivalence Point of Titration and label it on the titration curve below. (ii) What is the Titrant (iii) From the graph, what is the [H^+] and the volume of NaOH used to reach the equivalence point. (iv) Calculate the [OH^-] at the equivalence point (v) What is the pKa of the acid used for titration? (vi) Calculate the Ka of...
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