General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN: 9781305580343
Author: Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher: Cengage Learning
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Chapter 21, Problem 21.10QP
Interpretation Introduction
Interpretation:
For the given metals, the commercial source has to be identified.
Concept introduction:
Metal is material which can be an element, compound, or alloy and is hard. The properties of a metal are, it is shiny, malleable, fusible and ductile and have good electrical and thermal conductivity.
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1. A sample containing magnetite, Fe;O4, was analyzed by dissolving a 1.5419-g sample in
concentrated HCl, giving a mixture of Fe²+ and Fe+. After adding HNO3 to oxidize any Fe2+
to Fe+, the resulting solution was diluted with water and the Fe precipitated as Fe(OH)3
by adding NH3. After filtering and rinsing, the residue was ignited, resulting to 0.8525 g of
pure Fe2O3. Calculate the:
a) % (w/w) Fe
b) % (w/w) Fe;O4 in the sample.
One way to determine the concentration of hypochlorite ions (ClO–) in solution is by first reacting them with I– ions. Under acidic conditions the products of this reaction are I2 and Cl– ions. Then the I2 produced in the first reaction is titrated with a solution of thiosulfate ions (S2O32–). The products of the titration reaction are S4O62– and I– ions.
1. A sample containing magnetite, Fe;O4, was analyzed by dissolving a 1.5419-g sample in
concentrated HCI, giving a mixture of Fe2+ and Fe³+. After adding HNO3 to oxidize any Fe2+
to Fet, the resulting solution was diluted with water and the Fe+ precipitated as Fe(OH)3
by adding NH3. After filtering and rinsing, the residue was ignited, resulting to 0.8525 g of
pure Fe2O3. Calculate the:
a) % (w/w) Fe
b) % (w/w) Fe;O4 in the sample.
Chapter 21 Solutions
General Chemistry - Standalone book (MindTap Course List)
Ch. 21.9 - Considering the fact that N2 makes up about 80% of...Ch. 21.10 - Prob. 21.2CCCh. 21 - Prob. 21.1QPCh. 21 - Prob. 21.2QPCh. 21 - Prob. 21.3QPCh. 21 - Prob. 21.4QPCh. 21 - Prob. 21.5QPCh. 21 - Prob. 21.6QPCh. 21 - Prob. 21.7QPCh. 21 - Prob. 21.8QP
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