A steel chain submerged in water is susceptible to rusting. What effect is observed if sodium chloride is added to the water to produce a saturated solution?
Which of the following is not a role played by water when iron rusts in neutral water?
The density of iron is 7.87 g/cm3. When iron is oxidized during rusting, the density decreases to 5.24 g/cm3. By contrast, the density of aluminum is 2.70 g/cm3 and this value increases to 3.99 g/cm3 when the metal is completely oxidized.
What is the percentage change in volume when iron is converted completely to rust? Assume that no water is present at the end of the reaction.
What is the percentage change in volume when aluminum is completely oxidized?
Changes in volume during oxidation affect the amount of cracking caused by oxidation. How do the volume changes of iron and aluminum differ, and what effect does this difference have on the amount of cracking?