General Chemistry: Principles and Modern Applications, Loose Leaf Version (11th Edition)
11th Edition
ISBN: 9780133897319
Author: Ralph H. Petrucci, F. Geoffrey Herring, Jeffry D. Madura, Carey Bissonnette
Publisher: PEARSON
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Question
Chapter 5, Problem 85IAE
Interpretation Introduction
Interpretation:
The calcium content of a calcium dietary supplement needs to be deduced after it is dissolved in excess HCl and titrated with NaOH.
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.
- Concentration of a solution is expressed in terms of molarity which is the ratio of the moles of solute divided by the volume of the solution in liters.
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The active ingredient in a certain toilet cleaner that claims to ‘remove lime scale and rust’ is hydrochloric acid of approximate concentration 11.6 mol/L. To analyze this toilet cleaner, a quality control chemist first delivered a 10-mL aliquot of the toilet cleaner into a 250-mL volumetric flask, then made up the diluted solution. She then titrated a 27 mL aliquot of this diluted solution against standard sodium hydroxide solution of concentration 0.1705 mol/L. The expected titre (or volume of the titrant in mL) would be approximately:
A 19.95−mL sample of HCl of unknown concentration was transferred to a flask, a few drops of the indicator phenolphthalein were added, and the resulting solution was titrated with
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Chapter 5 Solutions
General Chemistry: Principles and Modern Applications, Loose Leaf Version (11th Edition)
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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- A 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_forwardRust, which you can take to be Fe(OH)3, can be dissolved by treating it with oxalic acid. An acid-base reaction occurs, and a complex ion is formed. (a) Write a balanced equation for the reaction. (b) What volume of 0.10 M H2C2O4 would be required to remove a rust stain weighing 1.0 g?arrow_forwardAn 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_forward
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