
CHEMISTRY (LOOSELEAF) >CUSTOM<
13th Edition
ISBN: 9781264348992
Author: Chang
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Question
Chapter 21, Problem 21.75QP
Interpretation Introduction
Interpretation:
The electrical conductance of copper metal decreases with temperature, but that of a CuSO4 solution increases with temperature has to be explained.
Concept introduction:
Electrical conductivity of metals:
- Electrical conductivity of metal is nothing but the moment of electrically charged particles or electrons.
- In metals, the atoms are characterized in the presence of valence electrons.
- The mobility of these valence electrons form one end to another end in a metal will generates electricity. This is called electrical conductivity in metals.
Metals:
- A metal is a material in the form of an element, compound, or in the form of alloy and which is basically hard when it is in solid state.
- Metals are good conductors and shows electrical conductiviy and thermal conductivity.
- Due to electron delocalization in conduction band metals shows electrical property.
- Metals have wide range of applications in industries and our daily life.
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1.
2.
(strongest)
3.
4.
5.
6.
7.
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10.
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EXERCISE B
pH, pOH, pка, AND PKD CALCULATIONS
1. Complete the following table.
Solution
[H+]
[OH-]
PH
РОН
Nature of Solution
A
2 x 10-8 M
B
1 x 10-7 M
C
D
12.3
6.8
2. The following table contains the names, formulas, ka or pka for some common acids. Fill
in the blanks in the table. (17 Points)
Acid Name
Formula
Dissociation reaction
Ka
pka
Phosphoric acid
H₂PO₁
H3PO4
H++ H₂PO
7.08 x 10-3
Dihydrogen
H₂PO
H₂PO
H+ HPO
6.31 x 10-6
phosphate
Hydrogen
HPO₁
12.4
phosphate
Carbonic acid
H2CO3
Hydrogen
HCO
6.35
10.3
carbonate or
bicarbonate
Acetic acid
CH,COOH
4.76
Lactic acid
CH₂CHOH-
COOH
1.38 x 10
Ammonium
NH
5.63 x 10-10
Phenol
CH₂OH
1 x 10-10
Protonated form
CH3NH3*
3.16 x 10-11
of methylamine
Chapter 21 Solutions
CHEMISTRY (LOOSELEAF) >CUSTOM<
Ch. 21.3 - Prob. 1RCFCh. 21.3 - Prob. 2RCFCh. 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 - Describe with examples the chemical and...Ch. 21 - Prob. 21.8QP
Ch. 21 - Prob. 21.9QPCh. 21 - Prob. 21.10QPCh. 21 - In the Mond process for the purification of...Ch. 21 - Copper is purified by electrolysis (see Figure...Ch. 21 - Prob. 21.13QPCh. 21 - Prob. 21.14QPCh. 21 - Prob. 21.15QPCh. 21 - Prob. 21.16QPCh. 21 - Which of the following compounds would require...Ch. 21 - Although iron is only about two-thirds as abundant...Ch. 21 - Prob. 21.19QPCh. 21 - Prob. 21.20QPCh. 21 - Prob. 21.21QPCh. 21 - Prob. 21.22QPCh. 21 - Prob. 21.23QPCh. 21 - Why is potassium usually not prepared...Ch. 21 - Prob. 21.25QPCh. 21 - Prob. 21.26QPCh. 21 - Prob. 21.27QPCh. 21 - Prob. 21.28QPCh. 21 - Prob. 21.29QPCh. 21 - Prob. 21.30QPCh. 21 - Prob. 21.31QPCh. 21 - Prob. 21.32QPCh. 21 - Prob. 21.33QPCh. 21 - Prob. 21.34QPCh. 21 - Prob. 21.35QPCh. 21 - Prob. 21.36QPCh. 21 - Prob. 21.37QPCh. 21 - Prob. 21.38QPCh. 21 - Prob. 21.39QPCh. 21 - Prob. 21.40QPCh. 21 - Prob. 21.41QPCh. 21 - Prob. 21.42QPCh. 21 - Prob. 21.43QPCh. 21 - With the Hall process, how many hours will it take...Ch. 21 - Aluminum forms the complex ions AlCl4 and AlF63....Ch. 21 - The overall reaction for the electrolytic...Ch. 21 - Prob. 21.47QPCh. 21 - Write a balanced equation for the thermal...Ch. 21 - Prob. 21.49QPCh. 21 - The pressure of gaseous Al2Cl6 increases more...Ch. 21 - Starting with aluminum, describe with balanced...Ch. 21 - Prob. 21.52QPCh. 21 - Prob. 21.53QPCh. 21 - Prob. 21.54QPCh. 21 - Prob. 21.55QPCh. 21 - Referring to Figure 21.6, would you expect H2O and...Ch. 21 - A 0.450-g sample of steel contains manganese as an...Ch. 21 - Given that Gf (Fe2O3) = 741.0 kJ/mol and that Gf...Ch. 21 - Prob. 21.59QPCh. 21 - Prob. 21.60QPCh. 21 - Prob. 21.61QPCh. 21 - Explain each of the following statements: (a) An...Ch. 21 - Prob. 21.63QPCh. 21 - Write a balanced equation for the reaction between...Ch. 21 - Prob. 21.65QPCh. 21 - Explain why most metals have a flickering...Ch. 21 - Prob. 21.67QPCh. 21 - Prob. 21.68QPCh. 21 - The following are two reaction schemes involving...Ch. 21 - Prob. 21.70QPCh. 21 - Prob. 21.71QPCh. 21 - Prob. 21.72QPCh. 21 - After heating, a metal surface (such as that of a...Ch. 21 - Prob. 21.74QPCh. 21 - Prob. 21.75QPCh. 21 - As stated in the chapter, potassium superoxide...Ch. 21 - A sample of 10.00 g of sodium reacts with oxygen...
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