Principles of Chemistry: A Molecular Approach (3rd Edition)
3rd Edition
ISBN: 9780321971944
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 16, Problem 105E
Since soap and detergent action is hindered by hard water, laundry formulations usually include water softeners-called builders-designed to remove hard water ions (especially ca2+ and Mg2+) from the water. A common builder used in North America is sodium carbonate. Suppose that the hard water used to do laundry contains 75 ppm CaCO3 and 55 ppm MgCO3 (by mass). What mass of Na2CO3 will remove 90.0% of these ions from 10.0 L of laundry water?
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Experiment:
Each team will be provided with 5g of a mixture of acetanilide and salicylic acid. You will divide it into three 1.5 g portions in separate 125 mL Erlenmeyer flasks savıng some for melting point analysis. Dissolve the mixture in each flask in ~60mL of DI water by heating to boiling on a hotplate. Take the flasks off the hotplate once you have a clear solution and let them stand on the bench top for 5 mins and then allow them to cool as described below.
Sample A-Let the first sample cool slowly to room temperature by letting it stand on your lab bench, with occasional stirring to promote crystallization.
Sample B-Cool the second sample 1n a tap-water bath to 10-15 °C
Sample C-Cool the third sample in an ice-bath to 0-2 °C
Results:
weight after recrystalization and melting point temp.
A=0.624g,102-115°
B=0.765g, 80-105°
C=1.135g, 77-108
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Chapter 16 Solutions
Principles of Chemistry: A Molecular Approach (3rd Edition)
Ch. 16 - Prob. 16.1PCh. 16 - Prob. 16.1MPCh. 16 - Prob. 16.2PCh. 16 - Prob. 16.3PCh. 16 - Prob. 16.3MPCh. 16 - Prob. 16.4PCh. 16 - Prob. 16.4MPCh. 16 - Prob. 16.5PCh. 16 - Prob. 16.6PCh. 16 - Prob. 16.7P
Ch. 16 - For Practice 16.8 Calculate the molar solubility...Ch. 16 - Prob. 16.9PCh. 16 - Prob. 16.10PCh. 16 - For Practice 16.11
Which compound, FeCO3 or...Ch. 16 - Prob. 16.12PCh. 16 - For Practice 16.13
A 125.0-mL sample of solution...Ch. 16 - Prob. 1SAQCh. 16 - Prob. 2SAQCh. 16 - Prob. 3SAQCh. 16 - Prob. 4SAQCh. 16 - Prob. 5SAQCh. 16 - Prob. 6SAQCh. 16 - Prob. 7SAQCh. 16 - Prob. 8SAQCh. 16 - Prob. 9SAQCh. 16 - Prob. 10SAQCh. 16 - Prob. 11SAQCh. 16 - Prob. 12SAQCh. 16 - Prob. 13SAQCh. 16 - Prob. 14SAQCh. 16 - Prob. 15SAQCh. 16 - Prob. 1ECh. 16 - Prob. 2ECh. 16 - Prob. 3ECh. 16 - Prob. 4ECh. 16 - 5. Calculate the percent ionization of a 0.15 M...Ch. 16 - 6. Calculate the percent ionization of a 0.13 M...Ch. 16 - Prob. 7ECh. 16 - Prob. 8ECh. 16 - Prob. 9ECh. 16 - Prob. 10ECh. 16 - Prob. 11ECh. 16 - Prob. 12ECh. 16 - Prob. 13ECh. 16 - Prob. 14ECh. 16 - Prob. 15ECh. 16 - Prob. 16ECh. 16 - Prob. 17ECh. 16 - Prob. 18ECh. 16 - Prob. 19ECh. 16 - Prob. 20ECh. 16 - Prob. 21ECh. 16 - 22. A 100.0-mL buffer solution is 0.175 M in HClO...Ch. 16 - Prob. 23ECh. 16 - Prob. 24ECh. 16 - Prob. 25ECh. 16 - Prob. 26ECh. 16 - Prob. 27ECh. 16 - Prob. 28ECh. 16 - Prob. 29ECh. 16 - Prob. 30ECh. 16 - Prob. 31ECh. 16 - Which buffer system is the best choice to create a...Ch. 16 - Prob. 33ECh. 16 - Prob. 34ECh. 16 - Prob. 35ECh. 16 - Prob. 36ECh. 16 - Prob. 37ECh. 16 - Prob. 38ECh. 16 - Prob. 39ECh. 16 - Prob. 40ECh. 16 - Prob. 41ECh. 16 - A 20.0-mL sample of 0.125 M HNO3 titrated with...Ch. 16 - Prob. 43ECh. 16 - Prob. 44ECh. 16 - Prob. 45ECh. 16 - Prob. 46ECh. 16 - Prob. 47ECh. 16 - Prob. 48ECh. 16 - Prob. 49ECh. 16 - Prob. 50ECh. 16 - Prob. 51ECh. 16 - Prob. 52ECh. 16 - Prob. 53ECh. 16 - Prob. 54ECh. 16 - Prob. 55ECh. 16 - Prob. 56ECh. 16 - Prob. 57ECh. 16 - Prob. 58ECh. 16 - Prob. 59ECh. 16 - Prob. 60ECh. 16 - Prob. 61ECh. 16 - Prob. 62ECh. 16 - Prob. 63ECh. 16 - Prob. 64ECh. 16 - Use the Kspvalue from Table 16.2 to calculate the...Ch. 16 - Prob. 66ECh. 16 - Prob. 67ECh. 16 - Calculate the molar solubility of MX (Ksp= 1.27 ...Ch. 16 - Prob. 69ECh. 16 - Calculate the solubility (in grams per 1.00102mL...Ch. 16 - Prob. 71ECh. 16 - Determine if each compound is more soluble in...Ch. 16 - Prob. 73ECh. 16 - Prob. 74ECh. 16 - Prob. 75ECh. 16 - 76. Predict whether or not a precipitate forms...Ch. 16 - Prob. 77ECh. 16 - Prob. 78ECh. 16 - Prob. 79ECh. 16 - Prob. 80ECh. 16 - Prob. 81ECh. 16 - Prob. 82ECh. 16 - Prob. 83ECh. 16 - Prob. 84ECh. 16 - Prob. 85ECh. 16 - Prob. 86ECh. 16 - Prob. 87ECh. 16 - Prob. 88ECh. 16 - Prob. 89ECh. 16 - Prob. 90ECh. 16 - Prob. 91ECh. 16 - Prob. 92ECh. 16 - One of the main components of hard water is CaCO3....Ch. 16 - Prob. 94ECh. 16 - Prob. 95ECh. 16 - Calculate the solubility of silver chloride ii a...Ch. 16 - Prob. 97ECh. 16 - Prob. 98ECh. 16 - Prob. 99ECh. 16 - Prob. 100ECh. 16 - What relative masses of demethyl amine and...Ch. 16 - Prob. 102ECh. 16 - Prob. 103ECh. 16 - Prob. 104ECh. 16 - Since soap and detergent action is hindered by...Ch. 16 - Prob. 106ECh. 16 - Prob. 107ECh. 16 - Determine the solubility of Cul in 0.40 M HCN...Ch. 16 - Prob. 109ECh. 16 - Prob. 110ECh. 16 - Prob. 111ECh. 16 - Prob. 112ECh. 16 - Prob. 113ECh. 16 - Prob. 114ECh. 16 - Prob. 115ECh. 16 - Prob. 116E
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