Homework Answers
2.ans
| Amount of KHP in gms | NaOH solution in ml to neutralize. | molecular weight of NaOH | Conc of NaOH in Normality |
| ?? | 40 | ? | |
| Molecular weight of KHP = 204.23 |
3.Ans
KHC8H4O4 (aq) + NaOH (aq) --------- KNaC8H4O4 (aq) + H2O (L)
SO the net reaction ionic balance is
HC8H4O4- (aq) + OH- (aq) ----------------- C8H4O42- (aq) + H2O (l)
thiis is the answer.
Add Answer to:
2 &3
Read the experiment and answer the following questions as directed by your instructor. 1....
Pre-laboratory Assignment Name: Read the experiment and answer the following questions as directed by your instructor....
Pre-laboratory Assignment Name: Read the experiment and answer the following questions as directed by your instructor. 1. In this experiment, you will use potassium hydrogen phthalate (abbreviation KHP, formula HKCH.0) to standardize (to determine the concentration precisely of) the NaOH solution. What is the molar mass of KHP? 2. In Part 1, you will titrate a weighed mass of KHP (dissolved in water) with the unknown NaOH solution. What data must you collect in order to find [NaOH)? List the...
-e-laboratory Assignment Name: ead the experiment and answer the following questions as directed by your instructor...
-e-laboratory Assignment Name: ead the experiment and answer the following questions as directed by your instructor A student is performing a titration. Diagrams of the buret at the beginning and the end of the titration are shown at right. To the correct number of significant figures, what is the initial volume, the final volume, and the volume of solution added during the titration? 16 2) Formic acid (HCOOH) is a weak acid with K. - 1.8 x 10-4. a) Write...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS The following preparatory questions...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS The following preparatory questions should be answered before coming to lab. They are intended to introduce you to several jdeas that are important to aspects of the experiment. You must turn in your work to your instructor before you will be allowed to begin the experiment. Potassium acid phthalate, KHP (KHC4H&O4), is a primary standard reagent used to determine exactly the concentration of a solution of base, such...
I can't figure out how to find the concentration of the conjugate base. Question 2 If...
I
can't figure out how to find the concentration of the conjugate
base.
Question 2 If a 50.00 mL sample of 0.132 M ammonium chloride is titrated with 21.47 mL of 0.149 M NaOH, what is the pH of the titration mixture? (For NH4CI, Ka = 5.75 x 10-10, Selected Answer: 2 Correct Answer: 9.21 +0.02 Response This is in the buffered region of the titration. Therefore, calculate the moles of weak acid initially present and the Feedback: moles of...
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...
During the calculations for titration of vinegar experiment, you determined the molar mass of KHP by...
During the calculations for titration of vinegar experiment, you determined the molar mass of KHP by using the mass of K, H, and P instead of using KHC8H4O4. How would this change your results? Explain. We had to find the mass of KHP, moles of KHP, moles of NaOh, and moles of acetic acid, molarity of vinegar titrated, mass of acetic acid titrated in grams, and w/v % of acetic acid in vinegar
EXPERIMENT 10 ACID AND BASE TITRATION 2 Post - Laboratory Questions 1. Student A weighs 0.747...
EXPERIMENT 10 ACID AND BASE TITRATION 2 Post - Laboratory Questions 1. Student A weighs 0.747 g of KHP on a laboratory balance. The KHP was titrated with an unknown NaOH solution and the concentration of the NaOH was determined to be 0.113 M. Student B diluted 6 M HCl from the reagent shelf using a volumetric flask to obtain 0.6 MHCI. This solution was titrated with the same unknown NaOH solution and found to be 0.104 M. Which student...
Read the experiment and answer the following questions as directed by your instructor. 1. Write the...
Read the experiment and answer the following questions as directed by your instructor. 1. Write the equilibrium reaction and the equilibrium expression for the dissociation of acetic acid in water reaction: equilibrium expression: K. = 2. Identify the Bronsted-Lowry acid and the conjugate base in the reaction from #1. Explain what the difference is between these two species. 3. Draw the Lewis structure of acetic acid, and label the hydrogen atom that is removed during the equilibrium dissociation. 4. If,...
No clue for any of the following questions. In Ms experiment, dissociation of KHP occurs in...
No clue for any of the
following questions.
In Ms experiment, dissociation of KHP occurs in solution as shown on p. 32 in the Laboratory Manual. Similarly, which of the following accurately depots the balanced dissociation reaction of formic acid (CH_3COOH) in water? CH_3COOHM rightarrow CH_3CO^+(aq) + OH^-(aq) CH_3COOH(ap) rightarrow CH_3COO(aq) + H(aq) CH_3COOH(aq) rightarrow CH_3COO^-(aq) + H^+(aq) all of the above are accurate When a base of known concentration is added to an acid of unknown concentration, which is...
Data the experiment Record For the lab report, attach this data sheet (signed by your TA) to your...
please write out calculations for each box missing an answer
data the experiment Record For the lab report, attach this data sheet (signed by your TA) to your calculations page. REPORT ALL VALUES TO AT LEAST THREE SIGNIFICANT FIGURES. READ YOUR BURETTE TO THE NEAREST 0.05 mL increment. for on this sheet. Do your calculations on a separate piece of paper. Part One-Standardization of a NaOH solution of approximately 0.1 M. Trial 1 | Trial 2 | Trial 3 Mass...
Pre-laboratory Assignment Name: Read the experiment and answer the following questions as directed by your instructor. 1. In this experiment, you will use potassium hydrogen phthalate (abbreviation KHP, formula HKCH.0) to standardize (to determine the concentration precisely of) the NaOH solution. What is the molar mass of KHP? 2. In Part 1, you will titrate a weighed mass of KHP (dissolved in water) with the unknown NaOH solution. What data must you collect in order to find [NaOH)? List the...
-e-laboratory Assignment Name: ead the experiment and answer the following questions as directed by your instructor A student is performing a titration. Diagrams of the buret at the beginning and the end of the titration are shown at right. To the correct number of significant figures, what is the initial volume, the final volume, and the volume of solution added during the titration? 16 2) Formic acid (HCOOH) is a weak acid with K. - 1.8 x 10-4. a) Write...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS The following preparatory questions should be answered before coming to lab. They are intended to introduce you to several jdeas that are important to aspects of the experiment. You must turn in your work to your instructor before you will be allowed to begin the experiment. Potassium acid phthalate, KHP (KHC4H&O4), is a primary standard reagent used to determine exactly the concentration of a solution of base, such...
I
can't figure out how to find the concentration of the conjugate
base.
Question 2 If a 50.00 mL sample of 0.132 M ammonium chloride is titrated with 21.47 mL of 0.149 M NaOH, what is the pH of the titration mixture? (For NH4CI, Ka = 5.75 x 10-10, Selected Answer: 2 Correct Answer: 9.21 +0.02 Response This is in the buffered region of the titration. Therefore, calculate the moles of weak acid initially present and the Feedback: moles of...
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...
EXPERIMENT 10 ACID AND BASE TITRATION 2 Post - Laboratory Questions 1. Student A weighs 0.747 g of KHP on a laboratory balance. The KHP was titrated with an unknown NaOH solution and the concentration of the NaOH was determined to be 0.113 M. Student B diluted 6 M HCl from the reagent shelf using a volumetric flask to obtain 0.6 MHCI. This solution was titrated with the same unknown NaOH solution and found to be 0.104 M. Which student...
Read the experiment and answer the following questions as directed by your instructor. 1. Write the equilibrium reaction and the equilibrium expression for the dissociation of acetic acid in water reaction: equilibrium expression: K. = 2. Identify the Bronsted-Lowry acid and the conjugate base in the reaction from #1. Explain what the difference is between these two species. 3. Draw the Lewis structure of acetic acid, and label the hydrogen atom that is removed during the equilibrium dissociation. 4. If,...
No clue for any of the
following questions.
In Ms experiment, dissociation of KHP occurs in solution as shown on p. 32 in the Laboratory Manual. Similarly, which of the following accurately depots the balanced dissociation reaction of formic acid (CH_3COOH) in water? CH_3COOHM rightarrow CH_3CO^+(aq) + OH^-(aq) CH_3COOH(ap) rightarrow CH_3COO(aq) + H(aq) CH_3COOH(aq) rightarrow CH_3COO^-(aq) + H^+(aq) all of the above are accurate When a base of known concentration is added to an acid of unknown concentration, which is...
please write out calculations for each box missing an answer
data the experiment Record For the lab report, attach this data sheet (signed by your TA) to your calculations page. REPORT ALL VALUES TO AT LEAST THREE SIGNIFICANT FIGURES. READ YOUR BURETTE TO THE NEAREST 0.05 mL increment. for on this sheet. Do your calculations on a separate piece of paper. Part One-Standardization of a NaOH solution of approximately 0.1 M. Trial 1 | Trial 2 | Trial 3 Mass...
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