Homework Answers
Ka does not depend on the concentration. The amount of ions produced is proportional to the concentration of the acid. And the equilibrium constant is the ratio of product of concentrations of the ions and the concentration of the acid. Hence if you start with less concentration of the acid you will get less concentration of ions. And the ratio will remain same. Hence, it doesn't matter where you start, you will find the same value of Ka.
**Comment if any doubt.
Add Answer to:
2. In question #1 you calculated the Ka value based on the starting pH. During lab,...
A thorough explanation would sure be appreciated!!!! Thank you!! Acid-Base Chemistry: Unknown Acid Analysis (in two...
A thorough explanation would sure be appreciated!!!!
Thank you!!
Acid-Base Chemistry: Unknown Acid Analysis (in two experiments) Introduction In this experiment you will titrate a monoprotic weak acid with a strong ak acid with a strong base in the nd using a pH meter (Exp 2). An analysis of concentration and molar mass of the the titration data will allow you to determine the concentration and more unknown acid (Exp 1) and the ionization constant Ka (Exp 2). At the...
3. Calculate the pH (Ka = 2.0 x 10-2 alculate the pH at the beginning of...
3. Calculate the pH (Ka = 2.0 x 10-2 alculate the pH at the beginning of a titration of 50.00 of 0. 20 x 10-2) with NaOH solution. If the quadratic equa e accurate, what would the percent error in the pH if the simple equation were used to calculate the phine of 50.00 of 0.005M HA quadratic equation is assumed to the simpler (square root) 4. According to Figure 19.1 at which point(s) ABCD on the titration curve does...
Workshop 5: Titration Curves A pH or titration curve can be produced by plotting the pH...
Workshop 5: Titration Curves A pH or titration curve can be produced by plotting the pH of a solution (containing an analyte) versus the volume of added The equivalence or end point of a titration occurs when enough titrant has been added to consume all the acid or base initially present in the analyte.You know you have reached the endpoint when you see a significant change in the pH of the solution. Part Lets begin by analyzing a titration curve...
DATA for Ka and Kbb.H titration.xlsx Using the data provided here, you need to construct a...
DATA for Ka and Kbb.H titration.xlsx Using the data provided here, you need to construct a titration curve (pH vs, volume of titrant) using excel; find the equivalence point (the deflection point of the titration curve, where the curvature changes, or the point of the maximum increase) from the curve, then read off the pH at the half equivalence point which is the value of pka and thus calculate ka. Repeat the same procedure for part II data to find...
Part A If you sketch the titration curve for α-melanotropin (SerTyrSerMetGluHisPheArgTrpGlyLysProVal), near what pH values would...
Part A If you sketch the titration curve for α-melanotropin (SerTyrSerMetGluHisPheArgTrpGlyLysProVal), near what pH values would you expect the curve to exhibit inflections? Assume the pKas of the N- and C-termini are 7.9 and 3.8, respectively. For side chains, assume the pKa values given. Express your answers as integers from lowest to highest separated by commas. Part B Calculate to three decimal places the charge on α-melanotropin at pH value of 11. Part C Calculate to three decimal places the...
This is from a Study of Buffer Solutions and pH of Salt Solutions Lab. I calculated...
This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
Please help me with question 3. The answer for question 2 is 25.44 ml 2 For...
Please help me with question 3. The answer for question 2 is
25.44 ml
2 For your pH titration you now want to weigh an amount of your unknown acid based on your answer to Question 1. However, you do not want to waste a lot of time trying to get the amount exactly. And even if you could, it is not necessary. Let's say you weigh out an amount equal to 513.9 mg (Close Enough But since this amount...
Post Lab Questions: To receive full credit, you must SHOW ALL YOUR WORKI 1. What is...
Post Lab Questions: To receive full credit, you must SHOW ALL YOUR WORKI 1. What is meant when one says that a buffer has a high buffer capacity? 2. What differences did you notice when you added acid or base to distilled water as compared to the buffer solutions? 3. The blood buffer system is made up of H2CO3 and HCO3-. Describe with the use of equations how this system responds to added H3O* and to added OH-. POST LAB...
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...
1) What is the pH when 5.00 mL of 0.200 M NaOH has been added to...
1) What is the pH when 5.00 mL of 0.200 M NaOH has been added to 50.00 mL of 0.100 M CH3CO2? Strategy Step 1: Use stoichiometry of the neutralization to determine the amounts of acid and conjugate base present in solution Step 2: Solve for equilibrium concentrations using ICE tables or Henderson-Hasselbalch approximation 2) Calculate the molar solubility of silver chromate in pure water. Ksp = 1.12 x 10¯12 3) Calculate Kb for the acetate ion from the Ka...
A thorough explanation would sure be appreciated!!!!
Thank you!!
Acid-Base Chemistry: Unknown Acid Analysis (in two experiments) Introduction In this experiment you will titrate a monoprotic weak acid with a strong ak acid with a strong base in the nd using a pH meter (Exp 2). An analysis of concentration and molar mass of the the titration data will allow you to determine the concentration and more unknown acid (Exp 1) and the ionization constant Ka (Exp 2). At the...
3. Calculate the pH (Ka = 2.0 x 10-2 alculate the pH at the beginning of a titration of 50.00 of 0. 20 x 10-2) with NaOH solution. If the quadratic equa e accurate, what would the percent error in the pH if the simple equation were used to calculate the phine of 50.00 of 0.005M HA quadratic equation is assumed to the simpler (square root) 4. According to Figure 19.1 at which point(s) ABCD on the titration curve does...
Workshop 5: Titration Curves A pH or titration curve can be produced by plotting the pH of a solution (containing an analyte) versus the volume of added The equivalence or end point of a titration occurs when enough titrant has been added to consume all the acid or base initially present in the analyte.You know you have reached the endpoint when you see a significant change in the pH of the solution. Part Lets begin by analyzing a titration curve...
DATA for Ka and Kbb.H titration.xlsx Using the data provided here, you need to construct a titration curve (pH vs, volume of titrant) using excel; find the equivalence point (the deflection point of the titration curve, where the curvature changes, or the point of the maximum increase) from the curve, then read off the pH at the half equivalence point which is the value of pka and thus calculate ka. Repeat the same procedure for part II data to find...
This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
Please help me with question 3. The answer for question 2 is
25.44 ml
2 For your pH titration you now want to weigh an amount of your unknown acid based on your answer to Question 1. However, you do not want to waste a lot of time trying to get the amount exactly. And even if you could, it is not necessary. Let's say you weigh out an amount equal to 513.9 mg (Close Enough But since this amount...
Post Lab Questions: To receive full credit, you must SHOW ALL YOUR WORKI 1. What is meant when one says that a buffer has a high buffer capacity? 2. What differences did you notice when you added acid or base to distilled water as compared to the buffer solutions? 3. The blood buffer system is made up of H2CO3 and HCO3-. Describe with the use of equations how this system responds to added H3O* and to added OH-. POST LAB...
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...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago