I have the answers to these problems but I don't understand why these are the answers...
I have the answers to these problems but I don't understand why these are the answers and how to do them.
1. Vinegar was titrated with Mg(OH)2 to find the content of acetic acid (HC2H3O2). If 20.0mL of vinegar required 5.00 mL of .800M Mg(OH)2 to reach the end point, what is the concentration of acetic acid? (Answer: .400M)
2. A Student titrates 25.00mL of tap water with 18.2 mL of .100M AgNO3 to completely precipitate the chloride ion. The concentration of the chloride ion is... (Answer: 7.28E-2)
3. What mass of solid NaOH is needed to neutralize 250.0 mL of .125M H2C2O4? (Answer: 2.50g NaOH)
4. In a titration, 10.0mL of H2SO4 is required to neutralize .0400mol of NaOH. What is the [H2SO4]? (Answer: 2.00M)
5. It requires 38 millimeters of .11M NaOH is required to neutralize 1.0 g of a solid monoprotic acid. What is the approximate molecular weight of this acid? (Answer: 240gXmol-1)
6. A solution is prepared by adding 10.0mL of .10M HCl to 25.0mL of .040M NaOH. The pH of the resulting solution is (Answer: 12.60)
Thanks!
Homework Answers
Request Answer!
We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
Add Answer to:
I have the answers to these problems but I don't understand why
these are the answers...
1. A solution of sodium hydroxide (NaOH) was standardized against potassium hydrogen phthalate (KHP). A known...
1. A solution of sodium hydroxide (NaOH) was standardized against potassium hydrogen phthalate (KHP). A known mass of KHP was titrated with the NaOH solution until a light pink color appeared using phenolpthalein indicator. Using the volume of NaOH required to neutralize KHP and the number of moles of KHP titrated, the concentration of the NaOH solution was calculated. Molecular formula of Potassium hydrogen phthalate: HKC8H404 Mass of KHP used for standardization (g) 0.5100 Volume of NaOH required to neutralize...
Plz try to answer all questions. Assume that you have a sample of vinegar which has...
Plz try to answer all questions.
Assume that you have a sample of vinegar which has been made in the lab (this contains acetic acid which is CH_3COOH). If you have a standard solution of 0.103M NaOH solution, briefly describe how to determine the acetic content in the vinegar sample. Also, calculate the concentration of acetic acid if a 20.0mL sample of vinegar took 34.2 mL of base to reach a phenolphthalein endpoint. Give the concentration as both molarity and...
Question 4 Status: Not yet answered | Points possible: 1.00 Suppose you are titrating an acid...
Question 4 Status: Not yet answered | Points possible: 1.00 Suppose you are titrating an acid of unknown concentration with a standardized base. At the beginning of the titration, you read the base titrant volume as 2.86 mL. After running the titration and reaching the endpoint, you read the base titrant volume as 21.17 mL. What volume, in mL, of base was required for the titration? Type answer: Question 6 Status: Not yet answered Points possible: 1.00 Suppose you are...
page 74 Exp. 9: Acid-Base Titration Questions (show your work for the math problems!) Write a...
page 74 Exp. 9: Acid-Base Titration Questions (show your work for the math problems!) Write a balanced equation as in footnote 2 for the neutralization of formic acid with sodium hydroxide. 1. H-C-OH Formic acid If an air bubble is t initially in the tip of the vinegar buret, but disappears' during the 2. course of the titration, how would this affeet your calculation for the concentration of (larger, smaller, no effect)? Explain your answer. Explain how the indicator phenolphthalein...
Please answer all with the given data. Thank you Date Instructor Fill in the table below....
Please answer all with the given data. Thank you
Date Instructor Fill in the table below. Record your data with the correct number of significant digits. Volume of vinegar (before Trial1 Trial 2 you dilute) USAQ, 5.4 Mass of vinegar (before you 52 dilute) $100 5.20 4.91 Density of vinegar 0.96 0.94 Initial buret level 49.9 MD.IO 0.30 Final buret level 47.90 46.30 Volume of NaOH required for neutralization 47.80 46.00 Final solution color Hot / bright pink Hot /...
Questions (Pay attention to units and significant figures for the calculations sted molarity of NaOH 1....
Questions (Pay attention to units and significant figures for the calculations sted molarity of NaOH 1. For each of the following circumstances indicate whether the calculated molarity of would be lower, higher or unaffected. Explain your answer in each case a. The inside of the pipet used to transfer the standard HCl solution was wet with water. b. You added 40 mL of water to the titration flask rather than 25 mL. c. The buret, wet with water, was not...
6. A 50.0 mL sample of 0.528 M NHaNO, is diluted with water to a total...
6. A 50.0 mL sample of 0.528 M NHaNO, is diluted with water to a total volume of 250.0 mL What is the ammonium nitrate concentration in the resulting solution? 7. 75.0 ml. of a 0.250M NaCI solution is added to 35.8 ml. of 0.1150M NaCOs. What is the concentration of sodium ion in the final solution? 8, 34.62 mL. of 0.1510 M NaOH was needed to neutralize 50.0 mL of an H2SO4 solution. What is the concentration of the...
1. Write a complete, balanced chemical equation, with state symbols, for the reaction of aluminum with...
1. Write a complete, balanced chemical equation, with state symbols, for the reaction of aluminum with an aqueous solution of hydroiodic acid. 2.This question refers to the reaction described in problem 1. Identify the limiting reactant given 0.30 mol of aluminum and 1,200 mL of 0.30 M hydroiodic acid solution. Show the steps of the least product method. Write an outline of your major steps before “plunging” into the answer. 3. A solution of ammonium chloride reacts with a solution...
I feel like my answers are wrong, so can someone answer these questions? Thank you! 1....
I feel like my answers are wrong, so can
someone answer these questions? Thank you!
1. Consider the following reaction by which hydrochloric acid is used to neutralize 20 ml of 0.1 M NaOH. a. In the titration process: NaOH should be in the and it is called HCI should be in the and it is called ______ is neutralized by ____ henolphtalein will be added to the analyte to turn the __ _________ into ____at the endpoint. b. Write...
Discussion: 1. Compare the molarities of the three samples of vinegar that you analyzed. The "precision"...
Discussion: 1. Compare the molarities of the three samples of vinegar that you analyzed. The "precision" of your titration technique is how similar the three values are (the closer the values, the better your precision). 2. Compare the average molarity you obtained to the molarity of the acetic acid in the vinegar as listed on the vinegar bottle. What could account for any differences between these values? 3. How do your pH values compare to the pH determined using the...
1. A solution of sodium hydroxide (NaOH) was standardized against potassium hydrogen phthalate (KHP). A known mass of KHP was titrated with the NaOH solution until a light pink color appeared using phenolpthalein indicator. Using the volume of NaOH required to neutralize KHP and the number of moles of KHP titrated, the concentration of the NaOH solution was calculated. Molecular formula of Potassium hydrogen phthalate: HKC8H404 Mass of KHP used for standardization (g) 0.5100 Volume of NaOH required to neutralize...
Plz try to answer all questions.
Assume that you have a sample of vinegar which has been made in the lab (this contains acetic acid which is CH_3COOH). If you have a standard solution of 0.103M NaOH solution, briefly describe how to determine the acetic content in the vinegar sample. Also, calculate the concentration of acetic acid if a 20.0mL sample of vinegar took 34.2 mL of base to reach a phenolphthalein endpoint. Give the concentration as both molarity and...
Question 4 Status: Not yet answered | Points possible: 1.00 Suppose you are titrating an acid of unknown concentration with a standardized base. At the beginning of the titration, you read the base titrant volume as 2.86 mL. After running the titration and reaching the endpoint, you read the base titrant volume as 21.17 mL. What volume, in mL, of base was required for the titration? Type answer: Question 6 Status: Not yet answered Points possible: 1.00 Suppose you are...
page 74 Exp. 9: Acid-Base Titration Questions (show your work for the math problems!) Write a balanced equation as in footnote 2 for the neutralization of formic acid with sodium hydroxide. 1. H-C-OH Formic acid If an air bubble is t initially in the tip of the vinegar buret, but disappears' during the 2. course of the titration, how would this affeet your calculation for the concentration of (larger, smaller, no effect)? Explain your answer. Explain how the indicator phenolphthalein...
Please answer all with the given data. Thank you
Date Instructor Fill in the table below. Record your data with the correct number of significant digits. Volume of vinegar (before Trial1 Trial 2 you dilute) USAQ, 5.4 Mass of vinegar (before you 52 dilute) $100 5.20 4.91 Density of vinegar 0.96 0.94 Initial buret level 49.9 MD.IO 0.30 Final buret level 47.90 46.30 Volume of NaOH required for neutralization 47.80 46.00 Final solution color Hot / bright pink Hot /...
Questions (Pay attention to units and significant figures for the calculations sted molarity of NaOH 1. For each of the following circumstances indicate whether the calculated molarity of would be lower, higher or unaffected. Explain your answer in each case a. The inside of the pipet used to transfer the standard HCl solution was wet with water. b. You added 40 mL of water to the titration flask rather than 25 mL. c. The buret, wet with water, was not...
6. A 50.0 mL sample of 0.528 M NHaNO, is diluted with water to a total volume of 250.0 mL What is the ammonium nitrate concentration in the resulting solution? 7. 75.0 ml. of a 0.250M NaCI solution is added to 35.8 ml. of 0.1150M NaCOs. What is the concentration of sodium ion in the final solution? 8, 34.62 mL. of 0.1510 M NaOH was needed to neutralize 50.0 mL of an H2SO4 solution. What is the concentration of the...
I feel like my answers are wrong, so can
someone answer these questions? Thank you!
1. Consider the following reaction by which hydrochloric acid is used to neutralize 20 ml of 0.1 M NaOH. a. In the titration process: NaOH should be in the and it is called HCI should be in the and it is called ______ is neutralized by ____ henolphtalein will be added to the analyte to turn the __ _________ into ____at the endpoint. b. Write...
Discussion: 1. Compare the molarities of the three samples of vinegar that you analyzed. The "precision" of your titration technique is how similar the three values are (the closer the values, the better your precision). 2. Compare the average molarity you obtained to the molarity of the acetic acid in the vinegar as listed on the vinegar bottle. What could account for any differences between these values? 3. How do your pH values compare to the pH determined using the...
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