Homework Answers
Question 1.
The changes in pH after the addition of the acid (HCl) solution or base (NaOH) solution for the buffer can be neglected.
Explanation: A buffer solution resists the change in pH by the addition of a small amount of strong acid or strong base.
Whereas the change in pH after the addition of the acid (HCl) solution or base (NaOH) solution for distilled water is much more significant.
Explanation: Distilled water as such is neutral (pH = 7); when you add strong acid to it, it will be acidic (pH < 7), when you add a strong base to it, it will be basic (pH > 7)
Add Answer to:
2. What differences did you notice when you added acid or base to distilled water as...
Post Lab Questions: To receive full credit, you must SHOW ALLOON 1. What is meant when...
Post Lab Questions: To receive full credit, you must SHOW ALLOON 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-. Looking at the fractional...
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...
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...
5. Hydrofluoric acid is added to distilled water. Write the acid-base reaction that occurs. After writing...
5. Hydrofluoric acid is added to distilled water. Write the acid-base reaction that occurs. After writing the reaction, identify (label) all acids and bases and connect the conjugates with a line. HER & How Hotcams & Fans Com tate X Will this solution be (acidic, basic, neutral (circle correct choice) 6. The acid-dissociation constant for nitrous acid is 4.5x10-4. a) Calculate the equilibrium pH if the initial concentration of nitrous acid is 0.135 M. ? A HA + H₂O 0.135...
What is the shape of the titration curve (plot of pH vs. mL of added base)...
What is the shape of the titration curve (plot of pH vs. mL of added base) for titration of a weak acid by a strong base? In a titration, 10 mL of 0.10 M HF was titrated with 0.20 M KOH. Calculate the pH of the resulting solution after the addition of the following volumes of base: 0 mL, 2.5 mL, 5.0 mL, and 6.0mL. What volume of base is needed to reach the equivalence point? What species is present...
0/1 point Question 3 Which calculated titration curve only has 3 distinc strong acid/strong base reaction...
0/1 point Question 3 Which calculated titration curve only has 3 distinc strong acid/strong base reaction weak acid/strong base reaction strong acid/weak base reaction weak base/strong acid reaction 0/1 point Question 4 When a weak acid is titrated with a strong base. there are a total of 3 distinct regions of the titration curve that can be calculated the pH is high little titrant is present, but decreases as more of it is added. at no point during the titration,...
Describe how you expect the pH of your weak acid solution to change when strong base...
Describe how you expect the pH of your weak acid solution to change when strong base is slowly added to it. When making this description, assume you have a monoprotic acid. Comment on how much the pH changes at the beginning of the titration, when about half the acid has been titrated, and when nearly all the acid has been titrated. Use the terms half-equivalence point and equivalence point in this discussion. How would the titration curve of a diprotic...
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...
Carry out a serial titration of one drop of the weak base 0.05 M NH, (aka...
Carry out a serial titration of one drop of the weak base 0.05 M NH, (aka NH,OH) with 0.01 M HCI. Stir. Measure the pH values of the solutions. Plot the titration curve on the same graph with your strong acid/strong base and weak acid/strong base titration curves. Compare with the computer-simulated curve (Figure 14.7). NOTE: Data from the computer calculation give an equivalence point pH of 5.70 at 5.0 drops of added 0.01 M HCI. Observations: Lane 1-purple (pH...
To learn about titration types and how to calculate pH at different points of titration. In an acid-base titration, a...
To learn about titration types
and how to calculate pH at different points of titration. In an
acid-base titration, a titrant (solution of a base or acid) is
added slowly to an analyte (solution of an acid or base). The
titration is often monitored using a pH meter. A plot of pH as a
function of the volume of titrant added is called a pH titration
curve. Prior to the titration, the pH is determined by the
concentration of the...
Post Lab Questions: To receive full credit, you must SHOW ALLOON 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-. Looking at the fractional...
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...
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...
5. Hydrofluoric acid is added to distilled water. Write the acid-base reaction that occurs. After writing the reaction, identify (label) all acids and bases and connect the conjugates with a line. HER & How Hotcams & Fans Com tate X Will this solution be (acidic, basic, neutral (circle correct choice) 6. The acid-dissociation constant for nitrous acid is 4.5x10-4. a) Calculate the equilibrium pH if the initial concentration of nitrous acid is 0.135 M. ? A HA + H₂O 0.135...
0/1 point Question 3 Which calculated titration curve only has 3 distinc strong acid/strong base reaction weak acid/strong base reaction strong acid/weak base reaction weak base/strong acid reaction 0/1 point Question 4 When a weak acid is titrated with a strong base. there are a total of 3 distinct regions of the titration curve that can be calculated the pH is high little titrant is present, but decreases as more of it is added. at no point during the titration,...
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...
Carry out a serial titration of one drop of the weak base 0.05 M NH, (aka NH,OH) with 0.01 M HCI. Stir. Measure the pH values of the solutions. Plot the titration curve on the same graph with your strong acid/strong base and weak acid/strong base titration curves. Compare with the computer-simulated curve (Figure 14.7). NOTE: Data from the computer calculation give an equivalence point pH of 5.70 at 5.0 drops of added 0.01 M HCI. Observations: Lane 1-purple (pH...
To learn about titration types
and how to calculate pH at different points of titration. In an
acid-base titration, a titrant (solution of a base or acid) is
added slowly to an analyte (solution of an acid or base). The
titration is often monitored using a pH meter. A plot of pH as a
function of the volume of titrant added is called a pH titration
curve. Prior to the titration, the pH is determined by the
concentration of the...
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