When a 0.1M solution of a weak acid was titrated with base, the following results were...

Question

Question

When a 0.1M solution of a weak acid was titrated with base, the following results were obtained:

Equivalents of base added pH observed

0.05 3.4

0.15 3.9

0.25 4.2

0.40 4.5

0.60 4.9

0.75 5.2

0.85 5.4

0.95 6.0

Plot the results of this titration and determine the pKa of the weak acid from your graph.

Answer 1

Answer #1

5.71 5.30 .5.05 4.72 4.39 4. 3.73 0.15 0.25 0.35 0.45 0.55 o.65 -75 .05

yaxis is pH
x axis is equivalents of base added.
from graph at half equivalence point ie at 0.5 ph is 4.7
and we know that at half equivalance

pH=pKa
so, pKa=4.7

Answer 2

Similar Homework Help Questions

4. A weak acid was titrated with 0.1M NaOH, and the titration curve is shown, 14...

4. A weak acid was titrated with 0.1M NaOH, and the titration curve is shown, 14 12 10 pH of solution 0.600... 4 2 0 2 6 10 12 14 16 18 mL of Base added a. Is this a monoprotic or diprotic acid? b. Estimate the values of the pka(s) for this acid.
4. A weak acid was titrated with 0.1M NaOH, and the titration curve is shown, 14...

4. A weak acid was titrated with 0.1M NaOH, and the titration curve is shown, 14 12 10 8 pH of solution G ... 4 4 6 8 10 14 02 mL of Base added a. Is this a monoprotic or diprotic acid? - has two scemps b. Estimate the values of the pKa(s) for this acid. diprotic moto 32 botol
1. A weak acid (benzoic acid) is titrated with a strong base such as sodium hydroxide....

1. A weak acid (benzoic acid) is titrated with a strong base such as sodium hydroxide. Determine the pH at the half equivalence point of the titration. The Ka of the weak acid is 6.3 x 10-5. 2.Calculate the pH of a buffer made from 0.6 M HNO2 and 0.5 M NaNO2. Ka = 4.5 x 10-5 pKa = 4.3 Answer with one digit after the decimal place (e.g. 2.1) Hint: HNO2 is a weak acid. NaNO2 forms the conjugate...

A 40.0 mL solution of 30.0 M of succinic acid (aq) is titrated with 0.300 M...

A 40.0 mL solution of 30.0 M of succinic acid (aq) is titrated with 0.300 M of KOH. Find the pH of the solution. (pKa=4.2). A) initially B) 1/2 way to the equivalence point C) at the equivalence point D) 1.00 mL past the equivalence post 2) sketch the titration curve that results from above titration. Label A) only a weak base present. B) Buffer. C) Only a weak acid present. D) Strong base in excess. E) pH = pKa
20) the pH at the half titrated point of a weak acid strong base titration curve is 4.15, what is the pka and the f...

20) the pH at the half titrated point of a weak acid strong base titration curve is 4.15, what is the pka and the for the weak acid being titrated 9 7.08X10-9 Opha 4.15
A solution of a weak base is titrated with a solution of a standard strong acid....

A solution of a weak base is titrated with a solution of a standard strong acid. The progress of the titration is followed with a pH meter. Which of the following observations would occur?

1. Answer the following about the titration plot shown below, involving a monoprotic acid and base. 20 mL of 0.1M titran...

1. Answer the following about the titration plot shown below, involving a monoprotic acid and base. 20 mL of 0.1M titrand titrated with 0.1M titrant. Data points at 1 mL increments. 14.0 ܠܬܬܬܬܬܬܬܬܬܬܩ 0.0 10.0 20.0 30.0 40.0 50.0 Volume of titrant (mL) (a) Is the species being titrated an acid or a base? --- (b) Is the species being titrated strong or weak? (c) What is the value of K, (if a weak acid) or Kb (if a weak...
Prepare a titration curve (pH vs. equivalents strong base added if you choose a weak acid...

Prepare a titration curve (pH vs. equivalents strong base added if you choose a weak acid to be titrated) in which you plot at least 10 data points starting from 0-equiv added to 1 equiv added. Show how you can obtain the pKa for this acid from the plot. You can also choose a weak base to be titrated with strong acid. Use Excel for the calculations and for plotting. Show the calculations for how you obtained the pH at...
points A 0.1 M weak acid is titrated with a 0.2 M strong base, and the...

points A 0.1 M weak acid is titrated with a 0.2 M strong base, and the following titration curve is obtained. What is the Ka of the weak acid? рн 12.5 8 4.5 25 50 75 Volume of base (ml) 25 50 75 Volume of base (ml) 6.5x10-6 1.0x10-8 3.2x10-13 3.8x10-4 3.2x10-5 A Moving to another question will save this response. DELL

Based on the following information... please answer A. B. and C. TITRATION OF A WEAK ACID...

Based on the following information... please answer A. B. and C. TITRATION OF A WEAK ACID TRIAL #1 equivalence point halfway point 25 VOLUME OF BASE ADDED 30 35 40 TITRATION OF A WEAK ACID TRIAL #2 1 equivalence point Hd half-way point s 10 15 30 35 40 45 20 25 VOLUME OF BASE ADDED Trial 1 Trial 2 Mass of oxalic acid 0.2039 pH at equivalence point a Mass of oxalic acid 0.2099 at equivalence point nt 8,5...