Substance Appearance Melting Point Electrical Conductivity Solubility in Water brittle, white 800 °C only if melted/dissolved soluble Y shiny, malleable 1100 °C high insoluble hard, colorless 3550 °C none insoluble

Substance Appearance Melting Point Electrical Conductivity Solubility in Water brittle, white 800 °C only if melted/dissolved soluble Y shiny, malleable 1100 °C high insoluble hard, colorless 3550 °C none insoluble

Chemistry In Focus

7th Edition

ISBN:9781337399692

Author:Tro, Nivaldo J.

Publisher:Tro, Nivaldo J.

Chapter12: The Liquids And Solids Around Us: Especially Water

Section: Chapter Questions

Problem 43E: A 250-g sample of hard water contains 0.20gofCa(CO3). What is the hardness of the water in parts per...

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Concept explainers

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.

Question

Classify each substance in the table as either a metallic, ionic, molecular, or covalent network solid:

Substance
Appearance
Melting Point Electrical Conductivity Solubility in Water
brittle, white
800 °C
only if melted/dissolved
soluble
Y
shiny, malleable
1100 °C
high
insoluble
hard, colorless
3550 °C
none
insoluble

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