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Learning Task 1 Write TRUE if the statement is correct and FALSE if the statement is wrong. 1. Iron will rust if only oxygen, but no water, is present. 2. Reduction occurs at the cathode in an electrical cell. 3. Galvanic cells use chemical reactions to produce electricity. 4. Electroplating is commonly used to improve the appearance of metals or to prevent corrosion. 5. Tarnishing of silverware and greening of copper, bronze and brass involves electrochemical process.

Learning Task 1 Write TRUE if the statement is correct and FALSE if the statement is wrong. 1. Iron will rust if only oxygen, but no water, is present. 2. Reduction occurs at the cathode in an electrical cell. 3. Galvanic cells use chemical reactions to produce electricity. 4. Electroplating is commonly used to improve the appearance of metals or to prevent corrosion. 5. Tarnishing of silverware and greening of copper, bronze and brass involves electrochemical process.

Chemistry
Chemistry
9th Edition
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Steven S. Zumdahl
Chapter18: Electrochemistry
Section: Chapter Questions
Problem 122AE
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Learning Task 1 Write TRUE if the statement is correct and FALSE if the statement is wrong. 1. Iron will rust if only oxygen, but no water, is present. 2. Reduction occurs at the cathode in an electrical cell. 3. Galvanic cells use chemical reactions to produce electricity. 4. Electroplating is commonly used to improve the appearance of metals or to prevent corrosion. 5. Tarnishing of silverware and greening of copper, bronze and brass involves electrochemical process. Learning Task 2 Fill in the blanks. Supply the correct word from the word bank. oxygen alloy reactive chromium rusting corrodes sacrificial first flake stainless water less oxidation oxide zinc oil paint Iron or steel to form an iron 2 and faster than most other transition metals and readily does so in the presence of both. Iron corrosion is called and the chemical change with oxygen is called an reaction. Steel (an of iron) and iron can be protected by _which provides a barrier between the metal and air or water. Moving parts on machines can be protected by a water repellent or grease layer. This corrosion can be prevented by connecting iron to a more metal. This is called protection. By raixing iron with other metals such as you can make a non-rusting alloy called steel. Coating iron or steel with a layer is called galvanising. The zinc preferentially corrodes first to form a zinc oxide layer that doesn't. off. However, if a _metal. reactive metal is attached, the iron then rusts as it becomes the more
Transcribed Image Text:Learning Task 1 Write TRUE if the statement is correct and FALSE if the statement is wrong. 1. Iron will rust if only oxygen, but no water, is present. 2. Reduction occurs at the cathode in an electrical cell. 3. Galvanic cells use chemical reactions to produce electricity. 4. Electroplating is commonly used to improve the appearance of metals or to prevent corrosion. 5. Tarnishing of silverware and greening of copper, bronze and brass involves electrochemical process. Learning Task 2 Fill in the blanks. Supply the correct word from the word bank. oxygen alloy reactive chromium rusting corrodes sacrificial first flake stainless water less oxidation oxide zinc oil paint Iron or steel to form an iron 2 and faster than most other transition metals and readily does so in the presence of both. Iron corrosion is called and the chemical change with oxygen is called an reaction. Steel (an of iron) and iron can be protected by _which provides a barrier between the metal and air or water. Moving parts on machines can be protected by a water repellent or grease layer. This corrosion can be prevented by connecting iron to a more metal. This is called protection. By raixing iron with other metals such as you can make a non-rusting alloy called steel. Coating iron or steel with a layer is called galvanising. The zinc preferentially corrodes first to form a zinc oxide layer that doesn't. off. However, if a _metal. reactive metal is attached, the iron then rusts as it becomes the more
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