Question
In: Chemistry
A titration experiment is done with 1.37E-2 M NaOH to determine the acid concentration in 0.631...
A titration experiment is done with 1.37E-2 M NaOH to determine the acid concentration in 0.631 L of an unknown acidic solution. It was found that to reach the equivalence point 12.3 mL of strong base was needed. What was the pH of the original acidic solution?
Solutions
Expert Solution
By Molarity equation, M1V1 ( NaOH) = M2V2( unknown acid) 1.37*10^-2 * 12.3ml = M2* 631ml. So, M2= 2.6*10^-3. Concentration of acid= 2.6*10^-3. So, pH= -log[H3O+]= - log[ 2.6*10^-3]= 2.585. l
queen_honey_blossom answered 1 year agoRelated Solutions
Imagine that you are attempting to determine the concentration of an acid by titration with a...
Imagine that you are attempting to determine the
concentration of an acid by titration with a solution of sodium
hydroxide with a known concentration, using phenolphthalein as an
indicator. For each of the following sources of error, indicate
whether the calculated concentration of acid would be too
high or too low.
i. An air bubble was present in the tip of the buret before
beginning the titration but was absent at the end of the
titration.
ii. You added too...
Experiment 2: Using the Secondary Standard to Determine the Concentration of an Acid 1. In an...
Experiment 2: Using the Secondary Standard to Determine the
Concentration of an Acid
1. In an Erlenmeyer flask, add 25 mL of Unknown
#1 concentration of acetic acid
(CH3COOH) and 2 drops
of phenolphthalein indicator.
2. Coarse Titration:
(a) Take a burette from the Containers shelf
and place it on the workbench. Fill the burette
with 50 mL of the standardized sodium hydroxide
solution. Record the initial burette reading.
Place the Erlenmeyer flaskon the lower half of the
burette.
(b)...
Experiment 2: Using the Secondary Standard to Determine the Concentration of an Acid 1. In an...
Experiment 2: Using the Secondary Standard to Determine the
Concentration of an Acid
1. In an Erlenmeyer flask, add 25 mL of Unknown
#1 concentration of acetic acid
(CH3COOH) and 2 drops
of phenolphthalein indicator.
2. Coarse Titration:
(a) Take a burette
from the Containers shelf and place it on the workbench. Fill the
burette with 50 mL of the standardized
sodium hydroxide solution. Record the initial
burette reading. Place the Erlenmeyer
flask on the lower half of the
burette....
A titration is done using 1 M NaOH in the buret and 15mL of 1.8M HCL...
A titration is done using 1 M NaOH in the buret and 15mL of 1.8M
HCL in the Erlenmeyer flask. How many moles of HCl are left in the
flask after a total of 5mL of the 1M NaOH solution were added to
the flask
A chemist needs to determine the concentration of a sulfuric acid solution by titration with a...
A chemist needs to determine the concentration of a sulfuric acid solution by titration with a standard sodium hydroxide solution. He has a 0.1157 M standard sodium hydroxide solution. He takes a 25.00 mL sample of the original acid solution and dilutes it to 250.0 mL. Then, he takes a 10.00 mL sample of the dilute acid solution and titrates it with the standard solution. The endpoint was reached after the addition of 14.02 mL of the standard solution. What...
Exercise 1: Determining the Concentration of Acetic Acid Data Table 1. NaOH Titration Volume Initial NaOH...
Exercise 1: Determining the Concentration of Acetic Acid
Data Table 1. NaOH Titration Volume
Initial NaOH Volume (mL)
Final NaOH Volume (mL)
Total volume of NaOH used (mL)
Trial 1
7ml
0
7
Trial 2
7ml
0.4
6.7
Trial 3
7ml
0.6
6.5
Data Table 2. Concentration of
CH3COOH in Vinegar
Average volume of NaOH used (mL)
Concentration
CH3COOH in vinegar
(mol/L)
% CH3COOH
in vinegar
6.7
65mol/L
77%
Questions:
If the manufacturer of the vinegar used in the experiment...
For the titration of 75 mL of 0.10 M acetic acid with 0.10 M NaOH, calculate...
For the titration of 75 mL of 0.10 M acetic acid with 0.10 M
NaOH, calculate the pH. For acetic acid, HC2H3O2, Ka = 1.8 x 10-5.
(a) before the addition of any NaOH solution. (b) after 25 mL of
the base has been added. (c) after half of the HC2H3O2 has been
neutralized. (d) at the equivalence point.
You need to determine the concentration of a sulfuric acid solution by titration with a standard...
You need to determine the concentration of a sulfuric acid
solution by titration with a standard sodium hydroxide solution.
You have a 0.1539 M standard solution. You take a 25.00 mL sample
of the original acid solution and dilute it to 250.0 mL. You then
take a 10.00 mL sample of the dilute acid solution and titrate it
with the standard solution. You need 12.23 mL of the standard
solution to reach the endpoint. What is the concentration of the...
You need to determine the concentration of a sulfuric acid solution by titration with a standard...
You need to determine the concentration of a sulfuric acid
solution by titration with a standard sodium hydroxide solution.
You have a 0.1689 M standard solution. You take a 25.00 mL sample
of the original acid solution and dilute it to 250.0 mL. You then
take a 10.00 mL sample of the dilute acid solution and titrate it
with the standard solution. You need 17.49 mL of the standard
solution to reach the endpoint. What is the concentration of the...
nitial data Enter the concentration of NaOH used in the titration. (M) 0.5 Enter the mass...
nitial data
Enter the concentration of NaOH used in the titration. (M)
0.5
Enter the mass of unknown acid you used in grams. (g)
0.75
pH vs Volume Measurements
Table 1. pH readings
Volume (mL)
pH
Initial measurement
0
1.43
Data point 1
0.99
1.23
Data point 2
2
1.41
Data point 3
2.97
1.5
Data point 4
3.99
1.59
Data point 5
4.99
1.69
Data point 6
5.99
1.79
Data point 7
6.98
1.89
Data point 8
7.99
2...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- How does the physics learned in the classroom compare to physics in the real world? Provide...
- Please briefly explain the circumstances under which an environmental impact statement (EIS) must be filed and...
- Consider the following simple signaling model of education. A worker is either high productivity or low...
- Question：Consider the following statement, “The Morrison government this week announced $3.8 billion of infrastructure projects would...
- Think about the products that you have purchased recently. Were they a want or a need?...
- Comment on the description of the Lorenz Curve? Is this okay? Which type of tax system...
- Thank you! The Australian economy is "weak",with households weighed down by slow wages growth and higher...
ADVERTISEMENT