Would you expect the pH at the equivalence point to be higher, lower or the same? Explain.
Homework Answers
If the weak acid titration was repeated with the same weak acid used in the experiment but 150 ml of distiled water added to the beaker instead of 80 ml, then the expected ph at equivalence point would be same. This is because same number of moles of base is required for the titration reaction.
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Would you expect the pH at the equivalence point to be higher,
lower or the same?...
If the weak acid titration was repeated with the same weak acid used in this experiment...
If the weak acid titration was repeated with the same weak acid used in this experiment but 150 ml of distilled water was added to the beaker instead of 80 ml, would you expect the pH at the equivalence point to be higher, lower, or the same? Explain. 3.
Equivalence Point for Titration #1: 24.96 mL Equivalence Point for Titration #2: 25.40 mL Equivalence Point...
Equivalence Point for Titration #1: 24.96
mL
Equivalence Point for Titration #2: 25.40
mL
Equivalence Point for Titration #3: 25.20
mL
Midpoint pH for Titration #3: 9.80
QUESTIONS:
4) Set up the calculation required to determine
the concentration of the NaOH solution via titration of a given
amount of KHP. Include all numbers except the given mass of
KHP.
5) Set up the calculation required to determine
the concentration of the unknown strong acid via titration with a
known volume...
1. What is the definition of an 'equivalence point' in an acid/base titration? (1 point) 2....
1. What is the definition of an 'equivalence point' in an acid/base titration? (1 point) 2. In part one of the experiment, you will prepare the acid solutions being titrated from a stock solution. Describe how you will accurately prepare 10.00 mL of 0.100 M HCl solution using a 1.00 M HCl stock solution. In your response to this question, be very specific about the quantities of stock solution and deionized water to be used in the dilution and the...
If the pH at the equivalence point for titration of a monoprotic weak acid with NaOH...
If the pH at the equivalence point for titration of a monoprotic weak acid with NaOH is 9.00, and 10 mL of base is required to reach the equivalence point, how would you determine the pKa of the acid? the pKa is 9.00 determine the pH after 5 mL of base is added; this is the pKa determine the pH when 20 mL of base is added; this is the pKa the pKa is -log(9)
7.How would the molar mass of the unknown acid be affected (higher, lower, or no change)...
7.How would the molar mass of the unknown acid be affected (higher, lower, or no change) if the follow-ing errors occurred? Briefly explain why in each case. a.The pH meter was incorrectly calibrated to read lower than the actual pH. b.During the titration, several drops of NaOH missed the reaction beaker and fell onto the bench top. c.In Part B of the procedure the acid was dissolved in 75 mL of distilled water rather than the 50 mL called for...
QUESTION 22 Fill in the following blanks using one of the terms below: Equivalence point Higher...
QUESTION 22 Fill in the following blanks using one of the terms below: Equivalence point Higher Lower Polyprotic Basic Acidic Vertical Horizontal When you are titrating a weak acid with a base, the equivalence point will be reached when the pH of the overall solution is (basic or acidic7) is defined as the situation in the titration when the number of moles of acid and base are equal to each other. The higher the Ka of a weak acid, the...
4. Acetic acid is a weak acid and sodium hydroxide is a strong base, would you expect the equivalence point for thi...
4. Acetic acid is a weak acid and sodium hydroxide is a strong base, would you expect the equivalence point for this titration to be above pH 7, at pH 7, or below pH 7? Explain why this is the case. 5. Figure 3 shows the intermolecular forces present in 1-octanol. Identify and label these forces. Figure 3. 6. Sketch a diagram showing the intermolecular forces between acetic acid and water. 7. Sketch a diagram showing the intermolecular forces between...
Focus on Step A5 of the procedure, where one partner prepared their sample for visual titration...
Focus on Step A5 of the procedure, where one
partner prepared their sample for visual titration by adding
approximately 100mL of water to the to
sample in the plastic cup or beaker before beginning the
titration.
Note that this step was also repeated in the potentiometric
(pH-meter) titration in Part 2 (Step A7).
In both cases, the addition of more water was an experimental
necessity, to allow the solution to be stirred easily and to ensure
that the pH probe...
DATA AND CALCULATIONS Time at equivalence point (s) Time of color Trial *Equation for acid-base reaction...
DATA AND CALCULATIONS Time at equivalence point (s) Time of color Trial *Equation for acid-base reaction change (s) NaOH+HCI - 21 0s 1 250.5 NaOH+ HC2H3O2- 2 8l.55 99s 3 NH3+ HCl- 930s 4 NH3 + HC2H3O2- 90.55 81.Os Complete the reactions above. Attach copies of all four graphs to this report. 1. 2. Examine the time data for each of the Trials 1- -4. In which trial(s) did the indicator change color at about the same time as the...
a titration curve of an unknown acid whose equivalence point is at pH 7 segguest that?...
a titration curve of an unknown acid whose equivalence point is at pH 7 segguest that? a) this is a weak acid because the equivalence point of all strong acids is below 7 b) this is a strong acid because the equivalence point of all strong acids is pH 7 c) this is a weak acid because the equivalence point of all weak acids is pH 7 d) this is actually pure water please explain as much as you can. i think...
If the weak acid titration was repeated with the same weak acid used in this experiment but 150 ml of distilled water was added to the beaker instead of 80 ml, would you expect the pH at the equivalence point to be higher, lower, or the same? Explain. 3.
Equivalence Point for Titration #1: 24.96
mL
Equivalence Point for Titration #2: 25.40
mL
Equivalence Point for Titration #3: 25.20
mL
Midpoint pH for Titration #3: 9.80
QUESTIONS:
4) Set up the calculation required to determine
the concentration of the NaOH solution via titration of a given
amount of KHP. Include all numbers except the given mass of
KHP.
5) Set up the calculation required to determine
the concentration of the unknown strong acid via titration with a
known volume...
1. What is the definition of an 'equivalence point' in an acid/base titration? (1 point) 2. In part one of the experiment, you will prepare the acid solutions being titrated from a stock solution. Describe how you will accurately prepare 10.00 mL of 0.100 M HCl solution using a 1.00 M HCl stock solution. In your response to this question, be very specific about the quantities of stock solution and deionized water to be used in the dilution and the...
QUESTION 22 Fill in the following blanks using one of the terms below: Equivalence point Higher Lower Polyprotic Basic Acidic Vertical Horizontal When you are titrating a weak acid with a base, the equivalence point will be reached when the pH of the overall solution is (basic or acidic7) is defined as the situation in the titration when the number of moles of acid and base are equal to each other. The higher the Ka of a weak acid, the...
4. Acetic acid is a weak acid and sodium hydroxide is a strong base, would you expect the equivalence point for this titration to be above pH 7, at pH 7, or below pH 7? Explain why this is the case. 5. Figure 3 shows the intermolecular forces present in 1-octanol. Identify and label these forces. Figure 3. 6. Sketch a diagram showing the intermolecular forces between acetic acid and water. 7. Sketch a diagram showing the intermolecular forces between...
Focus on Step A5 of the procedure, where one
partner prepared their sample for visual titration by adding
approximately 100mL of water to the to
sample in the plastic cup or beaker before beginning the
titration.
Note that this step was also repeated in the potentiometric
(pH-meter) titration in Part 2 (Step A7).
In both cases, the addition of more water was an experimental
necessity, to allow the solution to be stirred easily and to ensure
that the pH probe...
DATA AND CALCULATIONS Time at equivalence point (s) Time of color Trial *Equation for acid-base reaction change (s) NaOH+HCI - 21 0s 1 250.5 NaOH+ HC2H3O2- 2 8l.55 99s 3 NH3+ HCl- 930s 4 NH3 + HC2H3O2- 90.55 81.Os Complete the reactions above. Attach copies of all four graphs to this report. 1. 2. Examine the time data for each of the Trials 1- -4. In which trial(s) did the indicator change color at about the same time as the...
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