EBK CHEMISTRY
EBK CHEMISTRY
9th Edition
ISBN: 9780100453807
Author: ZUMDAHL
Publisher: YUZU
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Chapter 20, Problem 90CWP

 (a)

Interpretation Introduction

Interpretation: The authenticity of the given statement is to be determined.

Concept introduction: The alkali metals occur in the combined state and occur in the minerals in the earth’s crust.

The melting point of gallium is 29.76C , that is very close to the room temperature.

Reaction of calcium with water is,

Ca(s)+2H2O(l)Ca(OH)2(aq)+H2(g)

Reaction of aluminum trichloride with water is,

AlCl3(s)+3H2O(l)Al(OH)3(aq)+HCl(aq)

Lithium reacts in the presence of oxygen as,

4Li(s)+O2(g)2Li2O(s)

To determine: The authenticity of the statement, “The alkali metals are found in the earth’s crust in the form of pure elements.”

(b)

Interpretation Introduction

Interpretation: The authenticity of the given statement is to be determined.

Concept introduction: The alkali metals occur in the combined state and occur in the minerals in the earth’s crust.

The melting point of gallium is 29.76C , that is very close to the room temperature.

Reaction of calcium with water is,

Ca(s)+2H2O(l)Ca(OH)2(aq)+H2(g)

Reaction of aluminum trichloride with water is,

AlCl3(s)+3H2O(l)Al(OH)3(aq)+HCl(aq)

Lithium reacts in the presence of oxygen as,

4Li(s)+O2(g)2Li2O(s)

To determine: The authenticity of the statement, “Gallium has one of the highest melting points known for metals.”

(c)

Interpretation Introduction

Interpretation: The authenticity of the given statement is to be determined.

Concept introduction: The alkali metals occur in the combined state and occur in the minerals in the earth’s crust.

The melting point of gallium is 29.76C , that is very close to the room temperature.

Reaction of calcium with water is,

Ca(s)+2H2O(l)Ca(OH)2(aq)+H2(g)

Reaction of aluminum trichloride with water is,

AlCl3(s)+3H2O(l)Al(OH)3(aq)+HCl(aq)

Lithium reacts in the presence of oxygen as,

4Li(s)+O2(g)2Li2O(s)

To determine: The authenticity of the statement, “When calcium reacts with water, one of the product is H2(g) .”

(d)

Interpretation Introduction

Interpretation: The authenticity of the given statement is to be determined.

Concept introduction: The alkali metals occur in the combined state and occur in the minerals in the earth’s crust.

The melting point of gallium is 29.76C , that is very close to the room temperature.

Reaction of calcium with water is,

Ca(s)+2H2O(l)Ca(OH)2(aq)+H2(g)

Reaction of aluminum trichloride with water is,

AlCl3(s)+3H2O(l)Al(OH)3(aq)+HCl(aq)

Lithium reacts in the presence of oxygen as,

4Li(s)+O2(g)2Li2O(s)

To determine: The authenticity of the statement, “When AlCl3 reacts with water, it produces an acidic solution.”

(e)

Interpretation Introduction

Interpretation: The authenticity of the given statement is to be determined.

Concept introduction: The alkali metals occur in the combined state and occur in the minerals in the earth’s crust.

The melting point of gallium is 29.76C , that is very close to the room temperature.

Reaction of calcium with water is,

Ca(s)+2H2O(l)Ca(OH)2(aq)+H2(g)

Reaction of aluminum trichloride with water is,

AlCl3(s)+3H2O(l)Al(OH)3(aq)+HCl(aq)

Lithium reacts in the presence of oxygen as,

4Li(s)+O2(g)2Li2O(s)

To determine: The authenticity of the statement, “Lithium reacts in the presence of excess oxygen gas to form lithium peroxide.”

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Chapter 20 Solutions

EBK CHEMISTRY

Ch. 20 - Prob. 1QCh. 20 - Prob. 2QCh. 20 - Prob. 3QCh. 20 - Diagonal relationships in the periodic table exist...Ch. 20 - Prob. 6QCh. 20 - Prob. 7QCh. 20 - Prob. 8QCh. 20 - All the Group 1A (1) and 2A (2) metals are...Ch. 20 - Prob. 10QCh. 20 - Prob. 13ECh. 20 - Prob. 14ECh. 20 - Prob. 15ECh. 20 - Prob. 16ECh. 20 - Prob. 17ECh. 20 - Prob. 18ECh. 20 - Prob. 19ECh. 20 - Prob. 20ECh. 20 - Prob. 21ECh. 20 - Electrolysis of an alkaline earth metal chloride...Ch. 20 - Prob. 24ECh. 20 - Prob. 25ECh. 20 - Prob. 26ECh. 20 - Boron hydrides were once evaluated for possible...Ch. 20 - Prob. 28ECh. 20 - Prob. 29ECh. 20 - Prob. 30ECh. 20 - Prob. 31ECh. 20 - Prob. 32ECh. 20 - Prob. 33ECh. 20 - Prob. 34ECh. 20 - The following illustration shows the orbitals used...Ch. 20 - Prob. 36ECh. 20 - Silicon is produced for the chemical and...Ch. 20 - Prob. 38ECh. 20 - The compound Pb3O4 (red lead) contains a mixture...Ch. 20 - Prob. 40ECh. 20 - Prob. 41ECh. 20 - Prob. 42ECh. 20 - Prob. 43ECh. 20 - Prob. 44ECh. 20 - Prob. 45ECh. 20 - Prob. 46ECh. 20 - Prob. 47ECh. 20 - Prob. 48ECh. 20 - Prob. 49ECh. 20 - Phosphate buffers are important in regulating the...Ch. 20 - Prob. 51ECh. 20 - Trisodium phosphate (TSP) is an effective grease...Ch. 20 - Prob. 53ECh. 20 - Prob. 54ECh. 20 - Prob. 55ECh. 20 - Complete and balance each of the following...Ch. 20 - Prob. 57ECh. 20 - Prob. 58ECh. 20 - How can the paramagnetism of O2 be explained using...Ch. 20 - Describe the bonding in SO2 and SO3 using the...Ch. 20 - Write the Lewis structure for O2F2. Predict the...Ch. 20 - Give the Lewis structure, molecular structure, and...Ch. 20 - Prob. 63ECh. 20 - Prob. 64ECh. 20 - Prob. 65ECh. 20 - Prob. 66ECh. 20 - Prob. 67ECh. 20 - Prob. 68ECh. 20 - Prob. 69ECh. 20 - Prob. 70ECh. 20 - Prob. 71ECh. 20 - Prob. 72ECh. 20 - Prob. 73AECh. 20 - The inert-pair effect is sometimes used to explain...Ch. 20 - How could you determine experimentally whether the...Ch. 20 - Prob. 76AECh. 20 - Prob. 77AECh. 20 - Prob. 78AECh. 20 - Prob. 79AECh. 20 - Draw Lewis structures for the AsCl4+ and AsCl6...Ch. 20 - Prob. 81AECh. 20 - Prob. 82AECh. 20 - Prob. 83AECh. 20 - What is a disproportionation reaction? Use the...Ch. 20 - Sulfur forms a wide variety of compounds in which...Ch. 20 - Prob. 86AECh. 20 - Prob. 87CWPCh. 20 - Prob. 88CWPCh. 20 - Prob. 89CWPCh. 20 - Prob. 90CWPCh. 20 - Prob. 91CWPCh. 20 - Nitrous oxide (N2O) can be produced by thermal...Ch. 20 - What is the hybridization of the central atom in...Ch. 20 - Prob. 94CWPCh. 20 - Prob. 95CWPCh. 20 - Prob. 96CWPCh. 20 - Prob. 97CPCh. 20 - Prob. 98CPCh. 20 - Lead forms compounds in the +2 and +4 oxidation...Ch. 20 - Prob. 100CPCh. 20 - Prob. 101CPCh. 20 - Prob. 102CPCh. 20 - You travel to a distant, cold planet where the...Ch. 20 - Prob. 104CPCh. 20 - Prob. 105CPCh. 20 - Prob. 106IPCh. 20 - Prob. 107IPCh. 20 - Although nitrogen trifluoride (NF3) is a thermally...Ch. 20 - While selenic acid has the formula H2SeO4 and thus...Ch. 20 - Prob. 110MPCh. 20 - Prob. 111MP
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