Chemistry: A Molecular Approach, Books a la Carte Edition; Modified MasteringChemistry with Pearson eText -- ValuePack Access Card -- for Chemistry: A Molecular Approach, 4/e
1st Edition
ISBN: 9780134465654
Author: Tro
Publisher: Pearson Education
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Chapter 3, Problem 77E
Interpretation Introduction
To determine: The required mass of potassium iodide.
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3) Propagation of uncertainty. Every measurement has uncertainty. In this problem, we'll
evaluate the uncertainty in every step of a titration of potassium hydrogen phthalate (a
common acid used in titrations, abbreviated KHP, formula CsH5KO4) with NaOH of an
unknown concentration.
The calculation that ultimately needs to be carried out is:
concentration NaOH
1000 x mass KHP × purity KHP
molar mass KHP x volume NaOH
Measurements:
a) You use a balance to weigh 0.3992 g of KHP. The uncertainty is ±0.15 mg (0.00015
g).
b) You use a buret to slowly add NaOH to the KHP until it reaches the endpoint. It takes
18.73 mL of NaOH. The uncertainty of the burst is 0.03 mL..
c) The manufacturer states the purity of KHP is 100%±0.05%.
d) Even though we don't think much about them, molar masses have uncertainty as well.
The uncertainty comes from the distribution of isotopes, rather than random
measurement error. The uncertainty in the elements composing KHP are:
a. Carbon:
b. Hydrogen:
±0.0008…
Don't used hand raiting and don't used Ai solution
How would you use infrared spectroscopy to distinguish between the following pairs of constitutional isomers?
(a)
CH3C=CCH3
||
and
CH3CH2C=CH
(b)
CH3CCH=CHCH3
and
CH3CCH2CH=CH2
Problem 12-41
The mass spectrum (a) and the infrared spectrum (b) of an unknown hydrocarbon are shown. Propose as many
structures as you can.
(a)
100
Relative abundance (%)
80
60
60
40
200
20
(b)
100
Transmittance (%)
10
20
20
80-
60-
40-
20
40
60
80
100
120
140
m/z
500
4000 3500
3000
2500
2000
1500
Wavenumber (cm-1)
1000
Chapter 3 Solutions
Chemistry: A Molecular Approach, Books a la Carte Edition; Modified MasteringChemistry with Pearson eText -- ValuePack Access Card -- for Chemistry: A Molecular Approach, 4/e
Ch. 3 - What is the empirical formula of a compound with...Ch. 3 - Prob. 2SAQCh. 3 - Prob. 3SAQCh. 3 - Prob. 4SAQCh. 3 - Prob. 5SAQCh. 3 - Prob. 6SAQCh. 3 - Q7. Name the compound .
a) phosphorus iodide b)...Ch. 3 - Prob. 8SAQCh. 3 - Prob. 9SAQCh. 3 - Prob. 10SAQ
Ch. 3 - Q11. Determine the mass of potassium in 35.5 g of...Ch. 3 - Prob. 12SAQCh. 3 - Prob. 13SAQCh. 3 - Prob. 14SAQCh. 3 - Prob. 15SAQCh. 3 - 1. How do the properties of compounds compare to...Ch. 3 - Prob. 2ECh. 3 - Prob. 3ECh. 3 - Prob. 4ECh. 3 - Prob. 5ECh. 3 - Prob. 6ECh. 3 - Prob. 7ECh. 3 - Prob. 8ECh. 3 - Prob. 9ECh. 3 - Prob. 10ECh. 3 - Prob. 11ECh. 3 - Prob. 12ECh. 3 - Prob. 13ECh. 3 - Prob. 14ECh. 3 - Prob. 15ECh. 3 - Prob. 16ECh. 3 - Prob. 17ECh. 3 - Prob. 18ECh. 3 - Prob. 19ECh. 3 - Prob. 20ECh. 3 - Prob. 21ECh. 3 - 22. Write a generic formula for each of the...Ch. 3 - 23. Determine the number of each type of atom in...Ch. 3 - Prob. 24ECh. 3 - Prob. 25ECh. 3 - 26. Write a chemical formula for each molecular...Ch. 3 - Prob. 27ECh. 3 - Prob. 28ECh. 3 - 29. Classify each compound as ionic or...Ch. 3 - 30. Classify each compound as ionic or...Ch. 3 - 31. Based on the molecular views, classify each...Ch. 3 - 32. Based on the molecular views, classify each...Ch. 3 - 33. Write a formula for the ionic compound that...Ch. 3 - Prob. 34ECh. 3 - Prob. 35ECh. 3 - Prob. 36ECh. 3 - Prob. 37ECh. 3 - 38. Name each ionic compound.
a. SnCl4
b. PbI2
c....Ch. 3 - 39. Give each ionic compound an appropriate...Ch. 3 - 40. Give each ionic compound an appropriate...Ch. 3 - Prob. 41ECh. 3 - Prob. 42ECh. 3 - Prob. 43ECh. 3 - Prob. 44ECh. 3 - Prob. 45ECh. 3 - Prob. 46ECh. 3 - Prob. 47ECh. 3 - 48. Name each molecular compound.
a. SO3
b. SO2
c....Ch. 3 - Prob. 49ECh. 3 - 50. Write the formula for each molecular...Ch. 3 - Prob. 51ECh. 3 - 52. Name each acid.
a. HCl(aq)
b. HClO2(aq)
c....Ch. 3 - Prob. 53ECh. 3 - 54. Write the formula for each acid.
a. phosphoric...Ch. 3 - Prob. 55ECh. 3 - Prob. 56ECh. 3 - Prob. 57ECh. 3 - 58. Refer to the nomenclature flowchart (Figure...Ch. 3 - 59. Calculate the formula mass for each...Ch. 3 - Prob. 60ECh. 3 - 61. Calculate the number of moles in each...Ch. 3 - 62. Calculate the mass of each sample.
a. 15.7 mol...Ch. 3 - 63. Determine the number of moles (of molecules or...Ch. 3 - Prob. 64ECh. 3 - Prob. 65ECh. 3 - 66. How many molecules (or formula units) are in...Ch. 3 - 67. Calculate the mass (in g) of each sample.
a....Ch. 3 - Prob. 68ECh. 3 - 69. A sugar crystal contains approximately 1.8 ×...Ch. 3 - Prob. 70ECh. 3 - 71. Calculate the mass percent composition of...Ch. 3 - Prob. 72ECh. 3 - Prob. 73ECh. 3 - 74. Iron in the earth is in the form of iron ore....Ch. 3 - 75. Copper(II) fluoride contains 37.42% F by mass....Ch. 3 - Prob. 76ECh. 3 - 77. The iodide ion is a dietary mineral essential...Ch. 3 - 78. The American Dental Association recommends...Ch. 3 - 79. Write a ratio showing the relationship between...Ch. 3 - Prob. 80ECh. 3 - Prob. 81ECh. 3 - Prob. 82ECh. 3 - Prob. 83ECh. 3 - 84. Calculate the mass (in kilograms) of chlorine...Ch. 3 - Prob. 85ECh. 3 - Prob. 86ECh. 3 - 87. A chemist decomposes samples of several...Ch. 3 - 88. A chemist decomposes samples of several...Ch. 3 - 89. Calculate the empirical formula for each...Ch. 3 - 90. Calculate the empirical formula for each...Ch. 3 - 91. The elemental mass percent composition of...Ch. 3 - 92. The elemental mass percent composition of...Ch. 3 - 93. A 0.77-mg sample of nitrogen reacts with...Ch. 3 - 94. A 45.2-mg sample of phosphorus reacts with...Ch. 3 - 95. From the given empirical formula and molar...Ch. 3 - 96. From the given molar mass and empirical...Ch. 3 - 97. Combustion analysis of a hydrocarbon produces...Ch. 3 - Prob. 98ECh. 3 - Prob. 99ECh. 3 - 100. Tartaric acid is the white, powdery substance...Ch. 3 - Prob. 101ECh. 3 - Prob. 102ECh. 3 - Prob. 103ECh. 3 - 104. When iron rusts, solid iron reacts with...Ch. 3 - Prob. 105ECh. 3 - Prob. 106ECh. 3 - Prob. 107ECh. 3 - 108. Write the balanced chemical equation for each...Ch. 3 - Prob. 109ECh. 3 - Prob. 110ECh. 3 - 111. Balance each chemical equation.
a. CO2(g) +...Ch. 3 - 112. Balance each chemical equation.
a. Na2S(aq) +...Ch. 3 - Prob. 113ECh. 3 - Prob. 114ECh. 3 - Prob. 115ECh. 3 - Prob. 116ECh. 3 - Prob. 117ECh. 3 - Prob. 118ECh. 3 - Prob. 119ECh. 3 - Prob. 120ECh. 3 - 121. How many molecules of ethanol (C2H5OH) (the...Ch. 3 - 122. A drop of water has a volume of approximately...Ch. 3 - 123. Determine the chemical formula of each...Ch. 3 - 124. Determine the chemical formula of each...Ch. 3 - Prob. 125ECh. 3 - Prob. 126ECh. 3 - 127. A metal (M) forms a compound with the formula...Ch. 3 - Prob. 128ECh. 3 - 129. Estradiol is a female sexual hormone that is...Ch. 3 - 130. Fructose is a common sugar found in fruit....Ch. 3 - 131. Combustion analysis of a 13.42-g sample of...Ch. 3 - 132. Estrone, which contains only carbon,...Ch. 3 - 133. Epsom salts is a hydrated ionic compound with...Ch. 3 - 134. A hydrate of copper(II) chloride has the...Ch. 3 - Prob. 135ECh. 3 - Prob. 136ECh. 3 - Prob. 137ECh. 3 - Prob. 138ECh. 3 - Prob. 139ECh. 3 - Prob. 140ECh. 3 - Prob. 141ECh. 3 - 142. A phosphorus compound that contains 34.00%...Ch. 3 - Prob. 143ECh. 3 - 144. Phosphorus is obtained primarily from ores...Ch. 3 - Prob. 145ECh. 3 - Prob. 146ECh. 3 - Prob. 147ECh. 3 - Prob. 148ECh. 3 - 149. Because of increasing evidence of damage to...Ch. 3 - Prob. 150ECh. 3 - 151. Lead is found in Earth's crust as several...Ch. 3 - Prob. 152ECh. 3 - 153. A compound of molar mass 229 g/mol contains...Ch. 3 - Prob. 154ECh. 3 - Prob. 155ECh. 3 - Prob. 156ECh. 3 - 157. When molecules are represented by molecular...Ch. 3 - Prob. 158ECh. 3 - Prob. 159ECh. 3 - Prob. 160ECh. 3 - 161. Without doing any calculations, arrange the...Ch. 3 - Prob. 162ECh. 3 - Prob. 163QGWCh. 3 - Prob. 164QGWCh. 3 - Prob. 165QGWCh. 3 - 166. A compound isolated from the rind of lemons...Ch. 3 - Prob. 167QGWCh. 3 -
168. Since the 1800s, the concentration of carbon...
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