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Chapter 9: Problem 31

How could you tell experimentally if \(\operatorname{Ti} \mathrm{O}_{2}\) is an ionic solid or a network solid?

Short Answer

Expert verified
To determine experimentally if TiO2 is an ionic solid or a network solid, perform the following tests: 1. Measure the melting point of TiO2. If it is very high, it may indicate a network solid. 2. Attempt to dissolve TiO2 in water. If it dissolves, this suggests an ionic solid; if insoluble, it suggests a network solid. 3. Test the electrical conductivity of dissolved or molten TiO2. Conductivity would indicate an ionic solid, while poor conductivity suggests a network solid. Analyze the results, comparing them to characteristic properties of ionic and network solids, to classify TiO2 based on these experimental observations.

Step by step solution

01

Check the melting point of TiO2

Measure the melting point of titanium dioxide (TiO2) using a high-temperature furnace or another suitable method. The melting point of ionic solids is typically high, while network solids have very high melting points.
02

Dissolve TiO2 in water

Try to dissolve a small amount of TiO2 in water. Observe and record whether the solid dissolves or remains insoluble. Ionic solids usually dissolve in water, whereas network solids are typically insoluble in water.
03

Conductivity test

If TiO2 dissolves in water, test the resulting solution for electrical conductivity using a conductivity meter. If TiO2 does not dissolve in water, melt a small amount of the solid and test its electrical conductivity when molten. Ionic solids usually conduct electricity when dissolved or molten, whereas network solids are poor conductors of electricity.
04

Analyze the results

Compare the results from the melting point, solubility, and conductivity tests to the characteristic properties of ionic and network solids. If TiO2 has a high (but not very high) melting point, dissolves in water, and conducts electricity when dissolved or molten, it is likely to be an ionic solid. If TiO2 has a very high melting point, is insoluble in water, and does not conduct electricity, it is more likely to be a network solid.

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