GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
11th Edition
ISBN: 9780134193601
Author: Petrucci
Publisher: PEARSON
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Chapter 5, Problem 61E
Interpretation Introduction
Interpretation:
The stage in an
Concept introduction:
- Titration is a method of quantitative analysis which is used to determine the concentration of unknown solutions.
- A titrant of known concentration is added to an analyte of known volume in the presence of a suitable indicator until the equivalence point is reached which is indicated by a change in the color of the analyte.
- In a titration, equivalence point is the point at which the amount of titrant added is just sufficient to neutralize the amount of analyte taken.
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2MnO4- (aq) + 5H2C2O4(aq) + 6H+(aq) → 2Mn+2(aq) + 10CO2(g) + 8H2O(l)
In a titration experiment, a 0.040 M solution of KMnO4(aq) is added from a buret to an acidified sample of H2C2O4(aq) in a flask with a volume of 20 mL. The endpoint of the titration is determined by the appearance of a faint pink color in the mixture. The initial buret reading is 6.09 mL and the final buret reading is 26.09 mL.
Identify the analyte and the titrant.
Identify the element oxidized and the element reduced. Justify your answer using oxidation numbers.
Calculate the concentration of the H2C2O4 sample.
In an acid-base titration experiment, a student first standardize NaOH (39.997 g/mol) with 0.7102 g of KHP (204.22 g/mol) and required 32.01 mL of the NaOH titrant solution to reach endpoint. After standardization, 0.1530 g of unknown monoprotic acid was titrated using the standardized NaOH solution and required 12.36 mL to reach the endpoint.
1.) What is the standardized concentration of titrant (in M)?
2.) What is the molar mass of the unknown monoprotic acid?
A student titrates 10.0 mL of the 2.000 M HC2H3O2(aq) with an NaOH(aq) solution of unknown concentration. The student monitors the pH during the titration. The following titration curve was created using the experimental data.
Write the balanced net ionic equation for the reaction that occurs when HC2H3O2(aq) and NaOH(aq) are combined.
2.Calculate the molar concentration of the NaOH(aq) solution.
3.Explain how the student can estimate the value of Ka for HC2H3O2(aq) using the titration curve.
Chapter 5 Solutions
GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
Ch. 5 - Using information from this chapter, indicate...Ch. 5 - Select the (a) best and (b) poorest electrical...Ch. 5 - What response would you expect in the apparatus of...Ch. 5 - NH2(aq) conducts electric current only weakly. The...Ch. 5 - Sketches (a-c) are molecular views of the solute...Ch. 5 - Prob. 6ECh. 5 - Determine the concentration of the ion indicated...Ch. 5 - Which solution has the greatest [SO42] ? a....Ch. 5 - A solution is prepared by dissolving...Ch. 5 - Prob. 10E
Ch. 5 - Prob. 11ECh. 5 - Prob. 12ECh. 5 - Which of the following aqueous solutions has the...Ch. 5 - Prob. 14ECh. 5 - Prob. 15ECh. 5 - If 18.2 mL H2O evaporates from 1.00 L of a...Ch. 5 - Prob. 17ECh. 5 - Assuming the volumes are additive, what he [NO3]...Ch. 5 - Complete each of the following as net ionic...Ch. 5 - Prob. 20ECh. 5 - Prob. 21ECh. 5 - Predict in each case whether a reaction is likely...Ch. 5 - What reagent solution might you use to separate...Ch. 5 - Prob. 24ECh. 5 - Prob. 25ECh. 5 - Prob. 26ECh. 5 - Complete each of the following as a net ionic...Ch. 5 - Every antacid one or more ingredients capable of...Ch. 5 - Prob. 29ECh. 5 - Prob. 30ECh. 5 - Which solutions would you use to precipitate Mg24...Ch. 5 - Prob. 32ECh. 5 - Assign oxidation states to the elements involved...Ch. 5 - Explain why these reactions cannot occur as...Ch. 5 - Prob. 35ECh. 5 - Prob. 36ECh. 5 - Balance these equations for redox reactions...Ch. 5 - Balance these equations for redox reactions...Ch. 5 - Balance these equations for redox reactions in...Ch. 5 - Balance these equations for redox reactions...Ch. 5 - Balance these equations for disproportionation...Ch. 5 - Prob. 42ECh. 5 - Prob. 43ECh. 5 - Prob. 44ECh. 5 - The following reactions do not occur in aqueous...Ch. 5 - The reactions do not occur in aqueous solutions....Ch. 5 - What are the oxidizing and reducing agents in the...Ch. 5 - Thiosulfate ion, S2O32 , is a reducing agent can...Ch. 5 - What volume of 0.0962 N NaOH is required to...Ch. 5 - Prob. 50ECh. 5 - Prob. 51ECh. 5 - How many milliliters of 0.0750MBa(OH)2 are...Ch. 5 - An NaOH(aq) solution cannot be made up to an exact...Ch. 5 - Household ammonia, used as a window cleaner and...Ch. 5 - Prob. 55ECh. 5 - Prob. 56ECh. 5 - Prob. 57ECh. 5 - A 7.55 g sample of Na2CO2(s) is added to 125 mL of...Ch. 5 - Prob. 59ECh. 5 - Prob. 60ECh. 5 - Prob. 61ECh. 5 - Prob. 62ECh. 5 - A KMnO4(eq) solution is to be standardized by...Ch. 5 - Prob. 64ECh. 5 - An iron ore sample weighing0.6132 g dissolved...Ch. 5 - The concentration of Mn2+(aq) can be determined by...Ch. 5 - The titration of 5.00 mL of a saturated solution...Ch. 5 - Prob. 68ECh. 5 - Prob. 69IAECh. 5 - Following are some laboratory methods occasionally...Ch. 5 - Prob. 71IAECh. 5 - You have a solution that is 0.0250 M Ba(OH) and...Ch. 5 - Prob. 73IAECh. 5 - Prob. 74IAECh. 5 - Prob. 75IAECh. 5 - An unknown whitesolid consists of two compounds,...Ch. 5 - Balance these equations for reactions in acidic...Ch. 5 - Prob. 78IAECh. 5 - A method of producing phosphine, PH2, from...Ch. 5 - Prob. 80IAECh. 5 - Prob. 81IAECh. 5 - A piece of marble (assume it is pure CaCO2) reacts...Ch. 5 - The reaction below can be used as laboratory...Ch. 5 - Refer to Example 5-10. Suppose that the KMnO4(aq)...Ch. 5 - Prob. 85IAECh. 5 - A 0.4324 g sample of a potassium hydroxidelithium...Ch. 5 - Prob. 87IAECh. 5 - Prob. 88IAECh. 5 - The active ingredients h a particular antacid...Ch. 5 - Prob. 90IAECh. 5 - Prob. 91IAECh. 5 - Copper refining traditionally involves "roasting"...Ch. 5 - Prob. 93IAECh. 5 - Sodium cyclopentadienide, NaC2H2, is a common...Ch. 5 - Manganese is derived from pyrolusiteore, an impure...Ch. 5 - Prob. 96FPCh. 5 - Prob. 97FPCh. 5 - Prob. 98FPCh. 5 - Prob. 99SAECh. 5 - Prob. 100SAECh. 5 - Prob. 101SAECh. 5 - Prob. 102SAECh. 5 - Prob. 103SAECh. 5 - Prob. 104SAECh. 5 - Prob. 105SAECh. 5 - Prob. 106SAECh. 5 - Prob. 107SAECh. 5 - When aqueous sodium carbonate, Na2CO2, is treated...Ch. 5 - Prob. 109SAECh. 5 - Consider the following redox reaction:...Ch. 5 - Balance the following oxidation—reduction...Ch. 5 - Prob. 112SAECh. 5 - What is the simplest ratio a:b when the equation...Ch. 5 - In the half-reaction in which NpO2+ is converted...Ch. 5 - Which list of compounds contains a nonelectrolyte,...Ch. 5 - Prob. 116SAECh. 5 - Which list of compounds contains two soluble...Ch. 5 - Classify each of the blowing statements as true or...Ch. 5 - Which of the following reactions are oxidation-...Ch. 5 - Prob. 120SAECh. 5 - Prob. 121SAE
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- An acid is titrated with NaOH. The following beakers are illustrations of the contents of the beaker at various times during the titration. These are presented out of order. Note: Counter-ions and water molecules have been omitted from the illustrations for clarity. (a) (b) (c) (d) (e) a. Is the acid a weak or strong acid? How can you tell? b. Arrange the beakers in order of what the contents would look like as the titration progresses. c. For which beaker would pH = pKa? Explain your answer. d. Which beaker represents the equivalence point of the titration? Explain your answer. e. For which beaker would the Ka value for the acid not be necessary to determine the pH? Explain your answer.arrow_forwardAssume you dissolve 0.235 g of the weak acid benzoic acid, C6H5CO2H, in enough water to make 1.00 102 mL of solution and then titrate the solution with 0.108 M NaOH. C6H5CO2H(aq) + OH(aq) C6H5CO2(aq) + H2O() (a) What was the pH of the original benzoic add solution? (b) What are the concentrations of all of the following ions at the equivalence point: Na+, H3O+, OH, and C6H5CO2? (c) What is the pH of the solution at the equivalence point?arrow_forwardA student is given 0.930 g of an unknown acid, which can be either oxalic acid, H2C2O4, or citric acid, H3C6H5O7. To determine which acid she has, she titrates the unknown acid with 0.615 M NaOH. The equivalence point is reached when 33.6 mL are added. What is the unknown acid?arrow_forward
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Acid-Base Titration | Acids, Bases & Alkalis | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=yFqx6_Y6c2M;License: Standard YouTube License, CC-BY