Problem A 25 00 mL sample of an unknown monoprotic acid (HA) was titrated with 0 5 mol L NaOH The pH of the resulting solution was measured after the addition of NaOH to the acid Determine the Ka of the unknown acid and its identity Procedure Graph the data from the table below Volume of NaOH added (mL) pH Volume of NaOH added (mL) pH 0 2 79 6 4 5 58 2 4 33 6 6 5 69 3 4 59 6 8 5 84 4 4 83 7 0 6 05 5 5 08 7 2 6 42 5 2 5 14 7 4 10 79 5 4 5 19 7 9 11 89 5 6 5 26 8 4 12 16 5 8 5 32 8 9 12 37 6 0 5 40 9 4 12 44 6 2 5 48 9 9 12 53 From the graph, determine the equivalence point Calculate the molar concentration of the acid Write the Ka expression for the ionization of HA in water Determine the initial H3O (before the addition of NaOH) What is the initial concentration of A Determine the Ka value for the unknown acid What is the identity of the acid

The Answer is in the image, click to view ...

Question: Problem: A 25.00 mL sample of an unknown monoprotic acid (HA) was titrated with 0.5 mol/L NaOH. The pH of the resulting solution was measured

Problem:

A 25.00 mL sample of an unknown monoprotic acid (HA) was titrated with 0.5 mol/L NaOH. The pH of the resulting solution was measured after the addition of NaOH to the acid. Determine the Ka of the unknown acid and its identity.

Procedure:

Graph the data from the table below.

Volume of NaOH added (mL)	pH	Volume of NaOH added (mL)	pH
0	2.79	6.4	5.58
2	4.33	6.6	5.69
3	4.59	6.8	5.84
4	4.83	7.0	6.05
5	5.08	7.2	6.42
5.2	5.14	7.4	10.79
5.4	5.19	7.9	11.89
5.6	5.26	8.4	12.16
5.8	5.32	8.9	12.37
6.0	5.40	9.4	12.44
6.2	5.48	9.9	12.53

From the graph, determine the equivalence point.

Calculate the molar concentration of the acid.
Write the Ka expression for the ionization of HA in water.
Determine the initial [H3O+] (before the addition of NaOH).
What is the initial concentration of A-?
Determine the Ka value for the unknown acid.
What is the identity of the acid?

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Chemistry Questions!

Problem 3-7A (Algo) Complete the accounting cycle after adjusting entries (LO3-4, 3-5, 3-6, 3-7) Crimson Tide Music Academy offers lessons in playing a wide range of musical instruments. The...

Can you please help me with the steps to answers the questions bellow thank you so much DETERMINATION OF THE DISSOCIATION CONSTANT OF WEAK ACIDS The acids used in parts (a) and (b) are not...

When an acid reacts with a base: 1) This is a neutralization reaction 2) Pink color will appear in the resulting solution 3) Both of the answers are correct 4) None of the answers is correct QUESTION...

A 0.288-g sample of an unknown monoprotic organic acid is dissolved in water and titrated with a 0.115 M sodium hydroxide solution. After the addition of 17.54 mL of base, a pH of 4.92 is recorded....

All required calculations must have the correct number of signifleant figures and units. tme axes, data points, and lines on the graph may be drawn in pencil, but all else must be using a pen. 1....

Read the information and work out the number of Hcl added (mol) for buffers 1 and 2. Please make sure the unrounded answer is 5 or more significant figures work out the ph work out the buffer...

Is acetic acid the unknown acid based on this data? Explain ata. Data: Experiment 2; Determination of an Acid Ionization Constant 0.100MNaH A. Determination of the Molar Mass of an Unknown Acid...

Suppose you forget which layer is which, and evaporate both the aqueous layer and the DCM layer. Both leave behind a residue of white solid. How can you tell which one is which? Suppose you forget...

Question 1 (5 points) The organic acid potassium hydrogen phthalate (KHP) releases one H+ per KHP molecule, and is often used for standardizing bases because KHP is a non- hygroscopic powder that is...

All of it please Student name: Q1:Chose the correct answer from the following 1 - How many grams of sodium acetate will adue to sumcient amount of solution of acetic acid to makin 100 ml of buffer...

All required calculations must have the correet number of significant figures and units. ine axes. data points, and lines on the graph may be drawn in pencil, but all else must be using a pen. 1....

UrLink Company is a newly formed company specializing in high-speed Internet service for home and business. The owner, Lenny Kirkland, had divided the company into two segments: Home Internet Service...

8) A company is issuing new preferred stock for $25 per share. The stock will pay $3.00 per share. The cost to float the new issue preferred stock is $1.50 per share. What is the annualized cost of...

A program is being written which only accepts numbers in the range 1 to 100 (inclusively) to be input. Validation routines are being used to check the input data. a Name two validation routines which...

Which statements are most accurate regarding the following classes? class A { private int i; protected int j; } class B extends A { private int k; protected int m; // some methods omitted } In the...

9. U.S. banks are heavily regulated by a variety of federal and state agencies. Regulators seek to reduce the risk of bank failure by restricting the riskiness of banks assets and by requiring...

10. One part of bank regulation is supervision and monitoring of banks activities. Banks must file quarterly call reports on their finances and submit to on-site examinations at least once a year....

6. A bank run occurs when depositors lose confidence in a bank and make sudden, large withdrawals. A run can cause a previously healthy bank to fail. It can result from self-fulfilling expectations:...